Hello boys, can you say me which chip have this module
http://www.newegg.com/Product/Produc...82E16820145197
and can you advice me other memory between 140-190$?(4GB)
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Hello boys, can you say me which chip have this module
http://www.newegg.com/Product/Produc...82E16820145197
and can you advice me other memory between 140-190$?(4GB)
those are powerchips and most people are getting really good results with them
hmm how are things going at micron? :D Do they have something to compete with powerchips high density IC's?
BTW, can these chips handle sub 30 tRFC's? The way I see things these new 4GB kits usually run at higher tRFC's around 55.
I think those Powerchip ICs need the high tRFCs >55 so they can really shine. Don't expect to run the tight subtimings you used with your D9 kit on a kit of those!
Exceleram EX2-8500 5-5-5-15 (2x1024MB) EX2-21066M2-SY *Micron*Quote:
Originally Posted by fireice2
Frequency: 1066MHz Latency: 5-5-5-15 Parity: Unbuffered
Voltage: 2.2-2.3V Pins: 240
Density > > > Module: 128Mx64 Chip: 64Mx8
came across these sticks in a german shop, I am curious myself if some1 already test these
I have a similar question. What speed can be expected with <=42 tRFC?Quote:
Originally Posted by fireice2
G.Skil pc8500 do rather well on my old dfi board, but i suspect these chips to be better.
tRFC most likely is 2GB module suffer due to density though i have seen D9GSV with tRFC=30@500MHz+
Expect 35 up to 400MHz,42 up to 485 MHz, 43-50+ up to 540+MHz and for top line 50-60 up to 590 MHz
I cannot set manually more than 42 so I could live with 425/430mhz cas4.Quote:
Originally Posted by Spyrus
Or just use the SPD and go with higher divider and freq.
Only bench will tell
Do they come with 8 layer PCB or 6?
6 layer.Quote:
Originally Posted by mc2k
Hey guys. Just got myself this kit and I'm wondering how you guys are getting such good results? Mine won't even run at their stock rated speed on 1066 5-5-5-15. I'm using an Asus P5E which is very similar to the Maximus Formula. I have tried ChaosMinionX's settings with no joy at all.
http://img84.imageshack.us/img84/8948/x38domkj0.th.jpg
Anyone have any secret tips?
hehe Jammer
why don't you try tightening the RAM a bit
i just got a retail kit in mail a couple of days ago
i'll do some testing on intel platform guys and put up a thread link when i start testing :up:
hahaha HEY YULEH!
tightening? these are 2x2GB kits bro. They don't even run at stock speed and you want me to tighten? *faints*
OK well hurry up and get tweaking... Oh, you testing on x38?
yeah i knowQuote:
Originally Posted by J@mmer
i actually have the PC9136 kit here which is binned at 571MHz 5-5-5-x but i guess once i test it i will also test some 4-4-4-x; 4-5-4-x and 5-4-4-x timings to see where they are at................i realise that 2GB kits probably don't do all too well with tight timings but i'm sure you could tighten it somewhere if you are below stock speeds :D:D:D:D::D :up: :up: :up:
Yeh but they should run at their rated speeds! I'd rather looser latencies and more headroom anyway.
ATM I got them at 890 5-4-4-10 2.0V that's 1:1 (which I hate, prefer to run my ram faster than FSB always).
1:1 is good
NB works less
better for long term and intel chipsets always perform well 1:1 anyways :up:
:rolleyes: Yes Chainy!
:rofl: :rofl: :rofl: :rofl:
i've done some testing with my 4GB kit
600MHz 5-5-5-15 SuperPi and 3D benchmarks no worries :D :up:
great RAM
Here is a link to the thread with full test report so far :up:
http://www.xtremesystems.org/forums/...d.php?t=186814
I'm testing mine now for a 24/7 clock.
8GB at 561 MHz 5-5-5-15 tRD 6 so far so good. Left Memtest86+ running this morning for a long term test. Last night I got two errors so I bumped the volts a bit to compensate and before I left it was fine...
Man! Nice OC with 4 modules! :up:Quote:
Originally Posted by zlojack
Thanks.Quote:
Originally Posted by Yellowbeard
These are the only 2GB modules I've found so far that can hack it above 1100MHz for 24/7 on my rig. Hopefully I get home to a nice clean blue screen with no errors.
looks like there is some confusion here from at least a couple of members at XS
i am just :banana::banana::banana::banana:ing with jammer. we are friends from i4memory and OCAU (FORUMS in Australia)
OF COURSE he should just RMA the RAM that doesn't run at rated timings rather than try tweaking :ROTF:
chainy is a mod in Intel section at OCAU and while a nice guy can have some captain obvious comments and hence why Zoltan here thanked me as chainy
STOP :banana::banana::banana::banana:ing PMing me now OK
I love zoltan and he's my forum buddy yuleh so back off :D
zoltan have you though about changing that gaylord name of yours or what :rofl: (THAT'S A JOKE FOR THE SLOW ONES THAT ARE ABOUT TO SEND ME ANOTHER PM :rolleyes:) :rofl::rofl::rofl:
see you at i4memory yuleh :D
Success!
100% pass on Memtest86+ for 10+ hours at 561 MHz PL6 on 8GB.
Now I need to start tweaking subtimings. Here's a benchmark:
http://img.photobucket.com/albums/v3...421FSB8GB2.png
WOW, you Aussie's are a tough bunch :p:Quote:
Originally Posted by dinos22
ACK! I thought I was on the wrong site again....the one with all the popups:kissbutt:
LOL yeh we've heard you're that way inclined YB. ;)
Yuleh, all good bro. I know your just being gay. :D
I have since sold the kit to a mate and they are working perfectly on his evga 750 FTW board. I think troubles had something to do with the broken ram dividers on x38 boards. I'm now using a Rampage Formula which seems to be a little better.
I am ready to purchase this Dominator kit. I was considering the G-Skills 8500's but I read that there might be issues with using them with a DFI X48 board.
Can anyone tell me if there will be any problems running 2 of these kits together for a total of 8gigs in a DFI X48 board with a Q9450? Thanks!
tested 2 kits of this Corsair
first reached 1160, second 1170
both 5-5-5-15@2.1V on P5K Premium
What do you reach with 8GB would be the next question ;)
How do these scale with voltage? Has anyone tried >2.3? Can they do 500 @ Cas 4?
I just picked myself up some of this and its amazing...its 1000x better then my ballistix i use to have, I'm almost able to keep up with the X38s with my 120$ P5K vanilla...has anyone had experence running this over 2.2v, I think I need more then 2.2 to hit 1170mhz which is the next step for me
But serously $120 in Canada with the dominator fan...greatest investment for my computer yet
They do not scale much with >2,1V
they barely scale at all with vdimm :D
thats the weird thing about powerchip, they really dont seem to care about vdimm at all :D
The neat thing is that some are hitting 1200+ at 2.1v which was never the norm for D9s.
how do I get higher if voltage doesn't matter...I just actually realized that after I booted with 2.00v normal settings, I guess I gotta kill my timings
You can experiment with it and see if some extra V will help. Just remember that the tested and warrantied voltage is 2.1v.Quote:
Originally Posted by DeanZ
And that's my goal :)Quote:
Originally Posted by Yellowbeard
Mine are doing fine at 2.1v at 1133MHz
That's with 8GB.
I'm going to try and push them further and see how high they can go, but 1133 for 8 GB is pretty good.
Yes it is, nice OC :up:Quote:
Originally Posted by zlojack
gungstar,
May I kindly ask which sub-timings you've used while testing those kits?
And voltages (especially NB and FSB Termination)?
For 4GB kits (2x 2GB) I usally set up 1.40v NB, do you think it's enough?
I own a P5K Premium/WiFi-AP and are expecting one kit to arrive tomorrow. :D
Thanks a lot for your help! :up:
Quote:
Originally Posted by gungstar
I received my 4GB PC8500 kit today (with cooler included, but not being used) and unfortunately I've not been able to successfully overclock it past 1110-1120MHz.
Several FSB / Performance Level combinations were tested but memTest86+ v2.01 reports errors after 3-4 (or less) passes on test 5.
Since PSC IC's don't care about more voltage I'm working at the rated 2.1v.
With my QX9650 running at 3825MHz (8.5x 450MHz) and the memory using the 5:6 divider, 1080MHz is completely stable at 5-5-5-15-3-50-6-3-3.
Somehow I expected more from this kit comparing to a G.Skill 1066MHz pair I've owned, but it's definitely not easy... I'd risk to say it's the same sh*t.
Maybe these PSC IC's are already pushed to the max...
I'm using 1.30v FSB Termination, 1.60v CPU PLL, 1.40v NB and Auto SB Voltage. Both spread spectrum's disabled and CPU vCore set at 1.40v (real).
Any suggestions on making this kit run at higher clocks?
Until now I haven't tried to sacrifice timings in order to achive more theoretical bandwidth.
I don't want to sound lazy but if anybody out there managed better results, please post some settings that are reasonable to implement for 24/7 usage (F@H running most of the time ;)).
Maybe my P35 chipset isn't the best one to squeeze this RAM but gungstar mentioned on a previous post that 1160 and 1170 were possible on two kits with a motherboard exactly the same as mine...
I'd really appreciate any help on this case.
Take care! :up:
P.S. With higher RAM clocks F@H works fine, but Prime95 stops one core after 1 or 2 hours.
Hi Miguel...
My 8GB were running at 425 FSB 1133 on 2.1v with PL6 5-5-5-15 TRFC 60
I believe tRD 6 is Transaction Booster Enabled 1
They passed 12 hours of Memtest86+
For some reason, out of all the benchmarks I have, I don't have one for those settings :(
I have since been experimenting with my CPU and have moved things around, so I don't have all the sub-timings perfect.
Right now at 450 FSB tRD 7 (Enabled 0 *I think*)tRFC 60 5-5-5-15 1125MHz
Thanks for your help, zlojack.
Later I'll try setting my FSB at 425MHz and TRFC at 60.
Maybe I've been insisting too much on setting TRFC at 50 or 55.
When I try pushing Performance Level too high the system doesn't even boot.
The Transaction Booster setting enabled/disabled depends a lot on the divider being used.
I wish Asus would call it Performance Level or tRD instead... :rolleyes:
Thanks again for your post.
Take care :up:
No problem. Actually, they do call it that on the Rampage Formula bios (which is what I use on my board).Quote:
Originally Posted by miguelca
Did you read the Anandtech article about straps and performance level? I highly recommend it.
Hi zlojack,
It seems the P5K Premium wasn't "blessed" with the correct technical terms on the BIOS setup.
I did read that great article/review from Anandtech, and many others that I use as guidelines for my testing.
Thanks anyway for posting the link! ;)
My tests with the RAM working at 1133MHz with 425MHz FSB failed very quickly.
I've tried relaxing timings (5-5-5-18 for example), fiddling with tRD (PL=7), disabling DRAM Static Read Control, with no positive outcome.
memTest86+ 2.01 fails on test 5 right on the 2nd pass.
Now, with the memory working at 1066MHz and 5-5-3-15-3-55-6-3-3 timings, PL=6, everything works fine.
I'm running Prime95 for more than one hour without any kind of error.
If I try PL=5 my system simply doesn't boot. This seems normal behaviour on 4GB kits with PSC IC's.
Maybe I'm asking too much from this memory on my current setup (probably MB limitation).
I'll try to further optimize timings and subtimings, and will probably stick with this configuration until I change my motherboard (soon).
I just want to have a stable system that is able to run F@H and one or two games just for relaxing purposes.
Thanks a lot for your precious help! :up:
Quote:
Originally Posted by zlojack
Well, we tried!
It's good to hear you've found something stable for folding. That's important.
Yes we did, and I appreciate your help!
Just a quick update:
Running at 1066MHz, 4:5 divider, 5-5-3-14-3-50-6-3-3, tRD=6
DRAM Static Read Control: Enabled
Passed more than 5 hours Prime95 Blend (while I was sleeping).
If I disable DSRC I can set tRD=5, otherwise the PC won't boot.
What do you think is more important?
It seems I loose a bit of memory bandwidth when I disable DSRC...
Thanks again and take care!
Quote:
Originally Posted by zlojack
Curious to know if anyone has tried to see if 1066 is doable below 2.0V? :idea:
just ordered a pair of these and should be here wednesday for my asus maximus 2 ... hopefully they actually work ... had some gskill which my board absolutely hated :/
wow, thanks for the heads-up. Which gskill do u have. I have the same motherboard and it runs really well with my 2x1 GB Ballistix ( 470, ddr1175 ) but I need 4GBs.
Was thinking 'bout the gskill pc8800 but now I have second thought.
mine was the gskill 8500 2x2GB
...my dominators will be here tomorrow and i can post back on how they hold up with this board
Quote:
Originally Posted by Copenhagen69
I had the exact same problems with the G.Skill F2-8000CL5D-4GBPQ on my Asus p5b board and a good friend of mine had the same problems with it on a gigabyte board. The memmory just doesn't work at stock 1000mhz, neither does it overclock very well.. When i insert my "Geil GX22GB64000PDC" i get way better results.
I'm considering of purchasing some of the corsair rams myself.
I just took stock of a Maximus Formula that I promptly flashed into a Rampage, and my Ballistix 8500 kit passed memtest at DDR2-1200 with VDIMM set to 2.2V in the BIOS. Are these newer chipsets just better at running D9 at higher clocks with less voltage, or do they just overvolt by a LOT?
i cant get my pair stable passed 1066.... even 1070 is unstable and cant pass any tests.... guess i got a lame set?
You said your board hated G.Skill, & now you're having issues with Corsair.Quote:
Originally Posted by Copenhagen69
Sounds like something's not set right in the bios man.
And the not so fun thing is, you might need to start digging around in subtimings to get things stable.
tRFC loose? (55+)
tRD loose?
I'd go & loosen every single subtiming a few notches...not joking either.
My P5Q is extremely sensitive to subtimings.
One decrease on the wrong one = unstable.
I actually cannot run auto subtimings as it's not stable. (though this is likely due to 8 GB & being OCed)
Just something to think about...i doubt you got two different RAM kits that are bad.
alrighty n7 ill take a gander at all those and see what i can come up with ... thanks
mine are very happy at 1140 with 2.1 (2.09 shown actual) at 5-5-5-15-52 pl 8 they im sure could do more either maybe tighter timings or same timings and pushed a bit more they are running fine
Hi, would like to join the discussion
Just got my sticks. at first they would not boot at 1066mhz
i had to do 8x444 giving me the following result
http://img116.imageshack.us/img116/9...mhz1210mq9.png
By neo_rtr at 2008-08-04
I would like to do 9x400 1066mhz but the pc will not boot.
Iam thinking of doing some lower speeds with low timings instead.
I have updated to BIOS 12.07 This time i can boot 8x450 1080mhz 5 5 5 15
(was not able to do it before)
http://img181.imageshack.us/img181/8818/prime95vz5.jpg
By neo_rtr at 2008-08-08
sample
http://img113.imageshack.us/img113/1...5151210eh0.png
By neo_rtr at 2008-08-08
The PLL is set to 1.56V this comes up as 1.712V reported by BIOS
I have try it 3 times (SET in Bios 1.66v, 160V & 1.56V) and appears that my system is stable in Prime (so far)
With out PLL set manually the PRIME95 (p95v256 64bit ver.). would fail with in a minute.
With PLL set so far 3 times run the series of tests with out failure.
Nice stuff Neo
I've found my stable 24/7 Orthos blend and Memtest86 stable settings for these sticks at 1147 MHz
This is with the Rampage Formula bios 0308 on my Maximus Formula.
Only 4GB as I sold the other two sticks.
http://img.photobucket.com/albums/v3...gtRD743GHz.png
zlojack: What bios settings are you using that enable you to get 10k+ and that 1147mhz memory?
I'm able to run 1120mhz with my OCZ reaper pc8500, and quite possibly higher because I have not tested for stability above this speed. I think the Dominators were at one time using the same chips as the OCZ reapers, but I'm not sure now.
I do believe that the memory is very similar at least.
BTW: what tRD are you using in that Everest benchmark? I can't seem to get tRD = 6 to work well at all, and tRD = 7 seems to top out at 460fsb...
I've only been playing with this memory/board for a few days though so hopefully I'll figure it out
I use tRD7 with the Rampage Formula bios 0308 flashed on my Maximus Formula. RAM is set at 2.02 in bios which gives 2.1 v actual.
I'll get you the settings later when I have a chance to write them down.
there are a few subtimings which can help a lot when you hit an error wall. tRTPD, tPTP, tRRD, tWTPD, tAPTRD, tAPTAD.
tRTPD (read to pre delay) add min +2 above value of tRP on 2gb sticks.
{
tAPTRD (all pre to ref delay) use tRTP + 2 (read to precharge)
tAPTAD (all pre to act delay) use tRTP + 2 (read to precharge)
} this is because you need to issue the command to all banks on same rank, you allow an extra clock to make sure they all receive the command, which is where the 2 comes from.
tRRD (act to act delay) basically you need to allow a slightly longer delay to ensure that when issuing a consecutive activate command that you allow at least enough time that the first activate command has arrived before activating another bank on the same rank, reason being that with four ranks you have double the amount of banks on each dimm and the chance of collisions on the bus becomes alot greater in a row cycle.
tWTPD (write to pre delay) little more time to complete write strobes usually results in lower latency and less errors / slowdowns, 14 - 16 are fine.
tPTP (pre to pre delay same rank) default is 1, which is ridiculously tight and i've seen it cause random errors at higher dram frequencies on certain IC's. 3 is the highest you can set, 2 is a good value for cautiousness. I havent in my experience found a value of 3 to be beneficial or help with errors at that point.
tRFC (refresh cycle turnaround) max turnaround between any two refresh commands. 8 bank / 4 rank sticks need at least 1.7x the amount of clocks for turnaround than the equivalent 4 bank / 2 rank sticks. Check JEDEC specs for DDR2-1066 and you will understand further. 1066 requires a minimum of 105ns for tRFC with 8 bank/4 rank due to FBAW (four bank active window) command turnaround (minimum time it takes for four banks active on any rank to complete their cycle which adds quite a large clock latency to ensure that any further activates dont collide or queue up and slow down bus traffic. 2 bank / 4 rank (256x4) 1gb sticks dont use FBAW so they can complete a refresh cycle alot more quickly, minimum for them is 54 or 56ns.
At 1066mhz CL5, tCK (clock period) is 533 / 5 (data freq / cas latency), 1.86ns. So to get tRFC from 105ns at 1066mhz, you would do 105 / 1.86, which gives you a timing value ~ 60t or so. Sometimes loosening tRFC up improves performance, as a more consistent queue of data from ram to cpu even though its slower to arrive still leave less unused clocks wasted rather than intermittent bursts then traffic jams and so on.,
other timings dont seem to have as large an influence as these do.
skews can have a large influence, and they are only relevant to a given frequency. they do change as you get farther from the previously skewed target frequency. you need to figure out how your particular board responds to skew changes and when it likes/dislikes them. it's a lot of trial and error, and guesswork. sometimes you can pick out which way skews need to be, but its not always obvious unless you are using really high dram frequency and fsb.
^Good info, which I have also found to be correct from my testing. D9 IC's allow you to have relatively very tight primary and secondary timings, however a lot of the newer IC's require a lot of trial and error to figure out what they need to be stable at a given frequency.
Here are my settings bios 0308:Quote:
Originally Posted by Archmage
mikeyakame...any suggestions for tightening there or for squeezing out more bandwidth?Quote:
Ai Overclock Tuner : Manual
OC From CPU Level Up : AUTO
CPU Ratio Control : Manual
- Ratio CMOS Setting : 9
FSB Frequency : 478
FSB Strap to North Bridge : 333
PCI-E Frequency: 100
DRAM Frequency: DDR2-1148
DRAM Command Rate : 2N
DRAM CLK Skew on Channel A: Normal
DRAM CLK Skew on Channel B: Normal
DRAM Timing Control: Manual
CAS# Latency : 5
RAS# to CAS# Delay : 5
RAS# Precharge : 5
RAS# ActivateTime : 15
RAS# to RAS# Delay : 3
Row Refresh Cycle Time : 60
Write Recovery Time : 6
Read to Precharge Time : 3
Read to Write Delay (S/D) : 8
Write to Read Delay (S) : 3
Write to Read Delay (D) : 5
Read to Read Delay (S) : 4
Read to Read Delay (D) : 6
Write to Write Delay (S) : 4
Write to Write Delay (D) : 6
Write to PRE Delay : 14
Read to PRE Delay : 5
PRE to PRE Delay : 1
ALL PRE to ACT Delay : 6 (5 here gave me higher latency)
ALL PRE to REF Delay : 6 (5 here gave me higher latency)
DRAM Static Read Control: Enabled
Ai Clock Twister : Strong
Transaction Booster : Manual
Common Performance Level [7]
Pull-In of CHA PH1 Disabled
Pull-In of CHA PH2 Disabled
Pull-In of CHA PH3 Disabled
Pull-In of CHA PH4 Disabled
Pull-In of CHA PH5 Disabled
Pull-In of CHB PH1 Disabled
Pull-In of CHB PH2 Disabled
Pull-In of CHB PH3 Disabled
Pull-In of CHB PH4 Disabled
Pull-In of CHB PH5 Disabled
CPU Voltage : 1.41875
CPU PLL Voltage : 1.52
North Bridge Voltage : 1.55
DRAM Voltage : 2.04 (I think it's at 2.12 actual)
FSB Termination Voltage : 1.24
South Bridge Voltage : 1.050
Loadline Calibration : Enabled
CPU GTL Reference : 0.67X
North Bridge GTL Reference : 0.67X
DDR2 Channel A REF Voltage : DDR2-REFF
DDR2 Channel B REF Voltage : DDR2-REFF
DDR2 Controller REF Voltage : DDR2-REFF
SB 1.5V Voltage : 1.5
I realize I'll have to try and test myself, but suggestions are welcome. :D
MCH tRD Phase Pull-ins are your best friend. If you can't tighten down to PL6, try pull in CHA PH1 , CHB PH1, CHA PH 4, CHB PH4, CHA PH5, CHB PH5 and see if passes Memtest86+ first or even posts. Pull in one at a time, and test each time. Pulling in individual phases carelessly when the lower PL is unpostable can cause cmos corruption, so if you choose to play with these keep a copy of your current bios settings in one of the OC profiles in case. I've corrupted my cmos data many a time when doing this, but It was the only way to understand the effect each has and what to not do! Always Pull in PH1 first, since this phase effects clock signal phase between DRAM and MCH, then depending on divider you are using the next ones will not always be the same. You're using to 5:6 which can be seen by number of phases for each channel.
1:1 has 2 phases / channel which is the bare minimum. (clock phase and data phase)
The other dividers which have more than 2 phases still have the same clock and data phase pull ins, but there are more of each.
3:4 has 3 phases /channel, 2 clock phase (PH1, PH2) and 1 data phase (PH3)
4:5 has 4 phases / channel, 3 clock phases (PH1-3) and 1 data phase (PH4)
5:6 has 5 phases / channel, 4 clock phases (PH1-4) and 1 data phase (PH5)
You just need to be careful when choosing Phases to pull in , you need to be able to comprehend the difference when divider changes if you do. Rule of thumb is if you can't pull in Phase 1 of CHA or CHB then you will not pull in any others. More NB voltage can help sometimes but depending on your FSB clock freq, DRAM clock freq, NB cooling, memory timings and even memory IC's you won't go any farther. You generally need less NB voltage to pull in a few phases to the lower Peformance Level, than to completely change all phases to lower PL. How much varies, and its scales as you go lower. Whatever you needed extra to get the current Performance level, will require generally at least 2 times the previous jump in voltage to go one lower. I know on my Ramapge to even Pull in certain phases to PL5 from PL6 I needed to add 0.1V, 1.53 -> 1.63V. PL7 -> PL6 at 440FSB needed 0.14V (1.39V -> 1.53V). PL6->PL5 at that frequency needs at least 0.25V more to post, I stopped trying after I got to 1.67v NB as even if you can supply enough voltage the NB has to run at high 30s/low 40s to be stable with PL5, so generally under water. PL6 stability is usually below high 40s.
You will gain decent amounts if you have some more fine adjustment in the tRD pull-ins and it's error free. In both memory latency and read speeds.
In my personal experience I found 5:6 to be the best divider to use on the Rampage, probably due to not having enough phases on the VRM. More VRM phases generally helps higher dividers to be more stable at high FSB. The Rampage Extreme with dual 8 phase VRM is alot more stable with higher FSBs and higher dividers. The Formula has a sucky 1:1 divider thats for certain. I tend to use 4:5 or 5:6, which are 400 and 333Mhz FSB straps respectively. The others refuse to post or can't be made stable enough above 450FSB with a quad core. I haven't tried a dual core on this board, so your experience maybe a little different to mine in regards to which divider/s you can and can't use beyond 450FSB. Only divider I could get 500FSB to post on with my quad core was 5:6, the others all refused to post period. 5:6 took a lot of fine adjustment to get to post at 500FSB, but I couldn't get my ram to be stable at 1200MHz which was a little disappointing!
Thanks zlojack and mike!
That was some excellent information :yepp:
I'll put it to good use.
Thanks mikeyakame, that's some very good information there. I learn something on these forums almost every day!
I'll play with that stuff tonight! I find the 5:6 divider works well for me (333 strap) while I haven't really tried the 4:5. I'm not sure if this RAM can get up to 1195 MHz stable, but it will be fun to try. PL6 doesn't post for me.
http://img87.imageshack.us/img87/962...bsrrt45xg7.png
By neo_rtr at 2008-08-14
Iam running 8x455 ddr2 1092 5-5-5-12 , 3 45 6 4subtimes
Dream Static Read Control Auto
Ai Clock Twister. Strong
Transaction boster Disable
Glad to be of help!Quote:
Originally Posted by zlojack
The Rampage can be really temperamental at high FSB and takes a lot of trial and error to get it to work right, but with patience you can prevail. Sometimes it takes no trial at all and works, then change a setting or 3 and it refuses to post!
The easiest way I figured out to test memory timings is to boot Memtest86+, go to the configuration menu, select #5 test and then continue back. Moving blocks around memory is extremely strenuous and will almost always bring out any timing errors.
If it successfully does 5 passes of #5 for me then I'll reboot and let it run a full test pass. It will almost always pass if you can get through 4 or 5 passes of #5. This way any problems that are left are usually easy to isolate with Prime95, OCCT or the likes, and I've found are generally due to CPU/NB GTL REF, vNB or vCore.
You can also easily spot if PLL needs adjustment by just watching how graphics are drawn on screen. if the image is rendered in out of order pixel areas then you probably have a PLL voltage which is either too high or low, this one is a bit of guess work and mostly noticing inconsistencies.
Nice.
Well, I've been able to pull in Phase 1 of Channel A and it passes 6 hours of Memtest86+, but if I try to pull in Phase 1, Channel B, I get no post with DETDRAM error.
I've bought these babbis as well. Plays well with my motherboard.
Subscribed for further info.
I'm picking up a kit of these on Monady, can't wait!
I plan on running them at 533MHz FSB 1:1 just to start with :D
Thanks for excellent info! I have these stick too, now I'm off to play with them =]
I'm having some issues with this ram running on my MAximus Formula. It will cause DET RAM hangs and sometimes it will post and load windows but as soon as it gets to desktop she locks up.
I checked to see if the voltages and timings are all correct and all was good. I ran memtest and the sticks passed. Can somebody give me some advice as to what I possibly might be missing? Spec are in my sig for the system if there is any other questions let-r-fly. Thanx
Tell us you timings (subtimings as well).Quote:
Originally Posted by By0T0xN
Hello, I apologize in advance for my English ... but I do not know English well and feel using the google translator. (they are Italian)
in our forum nobody uses the ram as my and I saw that you are very good ....
I have a problem with my memories ram Corsair Dominator PC2-8500 CL5 1066mhz 2x2GB version 2.1 v 1.1 .... my motherboard is an Asus p5q pro (bios 1406), a processor q6600.
I would like to know how to set the bios to try to make them go back often, at least 1120mhz. How should I set the timing and voltage? how to set pl and transaction booster?
as I understand it as the first test page, I have to lower the voltage to go back often these ram? true?
Thank you very much
Raffaele
WOW! 6 pages of the this memory and i havent found a single post operating at tRD 5. It has been proved time and again that DDR2 plataforms from Intel work better at lower tRDs, and an excellent explanation and examples can be found here:
http://www.anandtech.com/mb/showdoc.aspx?i=3208&p=9
Look at the numbers!:
We realized our best performance by pushing the MCH well beyond its specified range of operation. Not only were we able overclock the controller to 450MHz FSB but we also managed to maintain a tRD of 5 (for a TRD of about 11.1ns) at this exceptional bus speed. Using the 3:2 divider and loosening the primary memory timings to 5-5-5-12 allowed us to capture some of the best DDR2 memory bandwidth benchmarks attainable on an Intel platform
At everest, using a QX9650 at 9x450Mhz-memory read 10923 - memory write 9546 memory latency 45.5ns...thats a class ahead of the results posted here. Certainly tRd of 5 is a MUST for any memory tinker when working a DDR2 plataform- forget about raw speed- the benefits are more than destroyed by the looser tRD used-tRD of 6 or higher are meant for DDR3!
My first couple of corsair 2x2gb 8500 C5D had a problem and i am waiting an RMA, but my plan is to put the E8600 + P5Q deluxe combo at 10x450 3:2 divider and aim for tRD 5 CAS 5 operation...but i would rather lower the raw memory speed with the 5:4 or 1:1 divider than loose the tRD to 6...lets wait and see if these 2x2gb kits can operate well at tRD 5.
450MHz FSB on the 3:2 divider is DDR 1350. If you can hit that with 2x2GB 1066MHz sticks, I'll take my hat off to you.
What volts were you running on the NB to get tRD of 5 on the 450MHz FSB?
What other settings did you use?
Have you actually seen tRD of 5 working at 450 fsb?
I can't get that to work at all on my x38 chipset p5e flashed to Rampage Formula.
I thus use a tRD of 7 with pull-in enabled on the first channel. My OC is limited by RAM and x9 multiplier of the e8400, but that's fine. I get 10K everest scores still, however above 50ns latency.
My friend's p45 p5q-E can only manage tRD of 8 with 7 pull-in on the first channel (at 450 fsb)
I'm not sure how the anandtech guys did it... :shrug:
http://www.anandtech.com/mb/showdoc.aspx?i=3208&p=9
Moving on to the analysis at 450Mhz FSB, although we are able to show impressive memory read speeds at this same bus frequency using a 3:2 divider for DDR2-1350 CAS 5 at a tRD of 5, this configuration was far from stable on stock cooling alone - as was the memory speed. Most likely, the need to loosen tRD to 6 will be inevitable at this bus speed. Right from the start, we can see that TRD takes a hit as our minimum values thus far came at the lower 400Mhz FSB. What's more, possible memory configurations at this FSB do not seem to offer any real improvement over those at 400MHz. The first option worth considering, DDR2-900 at CAS 4, can be a little slow, especially considering that a tRD of 6 is not allowed. The DDR2-1200 choice will provide (at best) only miniscule gains over the same memory speed at 400MHz FSB because of the additional throughput efficiency made possible by the higher bus speed. Then again, the increase in TRD to 13.3ns, up from the minimum value of 12.5ns at 400MHz FSB, may completely negate any chance of a performance gain. Our last contender, DDR2-1080 at CAS 4, might be another neutral choice - on one hand there could be a small gain in performance over DDR2-1000 (CAS 4) seen at 400MHz FSB, but again the higher TRD may be this configuration's undoing.
In the end we decided to run our Intel Core 2 Extreme QX9650 at a final FSB of 400MHz with a multiplier of 10.0x at an even 4GHz. Our 4x1GB of OCZ DDR2 PC2-8000 Platinum Extreme Edition memory was set to run at DDR2-1000 (5:4) CAS 4 with a tRD of 5. Ultimately, the ASUS Rampage Formula provided us the ability to build a well-tuned system. Without question, ASUS' addition of BIOS options for direct tRD manipulation was instrumental to our successful overclock. When paired with top-end GPUs from either ATI or NVIDIA, our rig becomes a formidable gaming platform for enjoying today's titles and beyond.
i recommend people to read the whole article in order to better understand the benefits of using a tRD of 5 when overcloking DDR2 plataforms- there had been numerous reports that other chipsets do NOT obey the Anandtech's formula for allowed tRDs: so 1:1 operation at tRD 5 with speeds of 400Mhz FSB is a goal.
Moving to tRD of 6 AT suggests When viewed together the task of picking out a couple of the best choices becomes rather simple. A+ ratings, of course, go to the two configurations colored in light green (5:4 for DDR2-1000 CAS4 and 3:2 for DDR2-1200 CAS 5). You may be surprised, as we mentioned earlier, that they both use a humble 400MHz bus speed. If forced to choose another option, close second place awards might go to 450Mhz FSB - 1:1 and DDR2-900 CAS 4, or 4:3 DDR2-1200 CAS 5 (assuming your motherboard is capable of stable operation with the sometimes poorly implemented 4:3 divider). Just do not forget - whatever memory option you choose, be sure to remember the importance of tRD.
So a quick pathway for memory tweaking is:find stable voltages operations FSB 400 1:1 divider tRD of 5> increased FSB until tRD of 5 is no longer possible/stable> record results at this setting> move to tRd 6 CAS 5 and try 1:1/6:5/5:4 and 4/3 operation-whichever is best will keep the same FSB step increasing until the CPU is running closer/at the 24/7 frequency goal.
Unfortunately not many interested to run at 400 FSB with tRD 5 because thus resulting in lower CPU frequency.Quote:
Originally Posted by geok1ng
Not many here have a rare ES sample CPU or a premium QX CPU with unlock multiplier that allow higher multiplier with low FSB resulting in higher clock thus also allow lower tRD.
Therefore people using a higher FSB with appropriate multiplier thus resulting in higher clock with a slightly higher tRD with pulling in some phases to compensate.
not always, I`m stuck at 3.6ghz no matter what I do with my q6600 b3, so 400fsb is more then plenty for meQuote:
Originally Posted by Sparda
I've been reading the Anatech Article as well as this thread with great interest! It has really help to get more performance out of my hardware!
I am a learner Overclocker & doubt that I have yet fully understund all the setting of this board & how to push out more performance..
Thats to mikeyakame, I have used his settings succesfully for my setup, BIOS 0308, as follows:
Ai Overclock Tuner : Manual
OC From CPU Level Up : AUTO
CPU Ratio Control : Manual
- Ratio CMOS Setting : 8
FSB Frequency : 450
FSB Strap to North Bridge : 333
PCI-E Frequency: 115
DRAM Frequency: DDR2-1081
DRAM Command Rate : 2N
DRAM CLK Skew on Channel A: Normal
DRAM CLK Skew on Channel B: Normal
DRAM Timing Control: Manual
CAS# Latency : 5
RAS# to CAS# Delay : 5
RAS# Precharge : 5
RAS# ActivateTime : 15
RAS# to RAS# Delay : 3
Row Refresh Cycle Time : 60
Write Recovery Time : 6
Read to Precharge Time : 3
Read to Write Delay (S/D) : 8
Write to Read Delay (S) : 3
Write to Read Delay (D) : 5
Read to Read Delay (S) : 4
Read to Read Delay (D) : 6
Write to Write Delay (S) : 4
Write to Write Delay (D) : 6
Write to PRE Delay : 14
Read to PRE Delay : 5
PRE to PRE Delay : 1
ALL PRE to ACT Delay : 6
ALL PRE to REF Delay : 6
DRAM Static Read Control: Disabled
Ai Clock Twister : Strong
Transaction Booster : Manual
Common Performance Level [7]
Pull-In of CHA PH1 Enabled
Pull-In of CHA PH2 Disabled
Pull-In of CHA PH3 Disabled
Pull-In of CHA PH4 Enabled
Pull-In of CHA PH5 Enabled
Pull-In of CHB PH1 Enabled
Pull-In of CHB PH2 Disabled
Pull-In of CHB PH3 Disabled
Pull-In of CHB PH4 Disabled
Pull-In of CHB PH5 Enabled
CPU Voltage : 1.41875
CPU PLL Voltage : 1.52
North Bridge Voltage : 1.69
DRAM Voltage : 2.08 (I think it's at 2.14 actual)
FSB Termination Voltage : 1.60
South Bridge Voltage : Auto
Loadline Calibration : Enabled
CPU GTL Reference : 0.67X
North Bridge GTL Reference : 0.67X
DDR2 Channel A REF Voltage : Auto
DDR2 Channel B REF Voltage : Auto
DDR2 Controller REF Voltage : Auto
SB 1.5V Voltage : Auto
EVEREST Results:
Read: 9514 MB/s
Copy: 8203 MB/s
Write: 9019 MB/s
Latency: 52.7 ns
zlojack has managed to get a Read Performance of: 10032 MB/s
Is this feaseable for my setup? Would I be better of using the 9x Multi with 400FSB?
Furthermore I am not able to Pull-In CHB PH4, Pull-In of CHA PH2, Pull-In of CHA PH3, Pull-In of CHB PH2 or Pull-In of CHB PH3. Resulting in a hang at DET RAM during boot.
any suggestions for tightening there or for squeezing out even more performance? I do realize I'll have to try and test myself, but suggestions are more than welcome!
You sure you need 1.60v FSB termination voltage? That's high... Anandtech killed their qx9650 this way.
have you tried above 450 FSB with those settings? Maybe if you disable pull-in on some of those channels you'll be able to hit closer to 460 FSB. At around 470 FSB you start nearing 10k mb/s. If you can get 475FSB at tRD = 7, then you'll likely hit 10k.
I need to re-tweak my setup and flash to 0308 bios (running 0403 still).
Somehow after re-assembling my rig this last time I can no longer get it stable above 440 FSB at my same old settings :confused: I haven't looked into it thoroughly yet, but I was hitting 460+ before this, and my northbridge, RAM, and CPU temps have decreased since... strange
Edit: Wow... 1.69v northbridge is also very high. I've run mine at 1.63v , but for 450FSB, I was running 1.59v. Now at 1.48v because I'm at 440 FSB...drat
anyone have these (Corsair Dominator TWIN2X8500C5DF 4096MB) in combination with an abit quadGT AB9 that can share there optimal bios-settings? They will be arriving somewhere tomorrow :-)
Which is best of those? The 2x2GB kit PC8500 Dominator or the Ballistix Tracer RED PC6400 for high frequency @ CL5? Both seems to show good results... Maybe both these RAM's using the same IC's?
You do realize that I work for Corsair and that this is also the Corsair support area....right? While I never say bad things about our competition, there is absolutely no way I'm going to tell you buy another brand.Quote:
Originally Posted by 2good4you
PC8500 is faster than PC6400 so in this case, the Corsair is faster.
:rofl:Quote:
Originally Posted by Yellowbeard
Good sense of humour yellowbeard, made me chuckle :ROTF:
Well if you do so, you should argue for how your product is better so we buy it. The fact, I was just curious if the Crucial was matching those. I've already aimed for the Corsair PC8500 ram, bit help me instead. It quite hard to find some good OC with 2x2GB setups and wounder if the Corsair is the better of the already two mention RAM. Also the PC-rate don't says anything about the OC potential of the ramQuote:
Originally Posted by Yellowbeard
So is the Corsair the better of them two, and sorry of posting in wrong area, but xtreme bandwith area don't seems to be the better place.
He just said he's not going to tell you which is better. And now that you know he's a rep, if he told you the Corsairs were better, would you be surprised?
I can tell you that my Corsair 2x2 Dominators PC28500 ran at 1147 MHz 5-5-5 no problems
I had 8GB stable at 1133MHz 24/7 perfectly fine.
I don't work for either and will tell you the Dominators are WAY better.
P.S. Be sure to figure RMA shipping cost in with those Crucials!
I would love to see these sticks run a pl 5 aint happining, thats a good article, but lets face it pl 5 is very hard to pull off, with a decent fsb, your lucky to get 6, more like a 7 is reality.
The main reason I did not start campaigning for the Corsair is that I always try to avoid pimping or getting into a sales position. That is not really appropriate here IMO and not why we maintain this section.
At Corsair, we have an unmatched IC screening process. In this specific case, I beleive the Corsair to be the superior memory for OCing as it is tested to meet a higher specification than the other memory listed.
If I can answer specific questions about the Corsair memory, I'll be happy to do so.
Quote:
Originally Posted by Yellowbeard
Aren't you confusing this section with the Corsair Support one? This is Xtreme Bandwidth :confused:Quote:
Originally Posted by Yellowbeard
Yes, you are correct and I am confused :confused: Most of my posts here are in the Corsair section and I did not look before I posted.Quote:
Originally Posted by Zehnsucht
I need more coffee. :coffee:
But, this still applies. It is not really appropriate for me to be a pimp or salesman on forums at all. I try to stick to technical advice about our products so that the user can make an informed decision on their own.Quote:
The main reason I did not start campaigning for the Corsair is that I always try to avoid pimping or getting into a sales position. That is not really appropriate here IMO and not why we maintain this section.
hello
i am testing this RAm and very nice
http://img27.imageshack.us/img27/2162/23125t.jpg
Nice result! :up:Quote:
Originally Posted by bigcesar
Are you sure this is the limit of the RAM, looking at your cpu frequency and Vcore, it could also be your CPU being at its limit. Did you test with a lower multi?