where do you get this priceless chips? :S
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where do you get this priceless chips? :S
This processor was bought in Tokyo last February by a friend of mine.
from tokio to buenos aires
something like this
http://page8.auctions.yahoo.co.jp/jp/auction/h54341094
Guys, a piece of advice if you please.
I thought of swapping my E6750 for an E8400 so if you could give me some pointers on what FPO, pack date, revision i should look out for etc.
I guess C0 revision is the best one out right now, so what's the marking for it.
Tnx.
i would just take a look at this thread all the way through, noting batch numbers and stuff. usual intel rule(s) is the earlier the pack date on the same stepping is best.
from what ive read, the Q746A and Q750A are a pretty good choice, E8400 and E3110 alike.
I myself have an E3110 Q746A534 waiting at home for my replacement vanilla 680i SLI on friday... shooting for 450x9 until X48
dont forget the Q745A, which in my opinion has posted some of the best numbersQuote:
Originally Posted by brinox
the diode temp and the idle/full temps work fine in E8400 ES or E8500?
my Q745A have failed to impress me, or i'm doing something wrong over here.Quote:
Originally Posted by The Viper
Q745A576 has probably the best results I've seen anywhere in terms of hitting high stable clocks with very little voltage.
4ghz - 1.675vcore - SUperPi 1m
4ghz - 1.20vcore - Prime95
4.25ghz - 1.28cvore Prims, Orthos, OCCT stable
4.6ghz - 1.41vcore SuperPi 1m sub 10sec.
I dunno, has anyone seen better results?
Define "failed to impress" and thats why I said "some" :) but really thats pretty much the 1st Ive heawrd someone say about week 45Quote:
Originally Posted by mk-ultra
Had a Q746a and a Q750a and both failed to hit 4Ghz.
Just got a Q748A402, will see if it goes well later. 3rd time lucky :shrug:
I believe dark22 had a pretty nice chip (Q748A133).
mrcape - any idea what it takes for just 4.3Ghz? I think you'd have the only chip here <1.3v for that frequency. I thought dark22 also did, but I have to check back a few pages.
Problem is that most on this thread are simply testing for max and throw gobs of voltage at it...which I don't think mad_skills would be interested in.
You need to include the last 3 numbers as well.Quote:
Originally Posted by WiTcHkInG
Mav451 - Unfortunately I jacked the chip a bit up and I can't get that data from the perspective of a fresh, undamaged Q745A576 chip. I'm sure that before it was damaged it could do 4.3ghz with one more notch, maybe 1.29v. I say that based on the way it scaled up to 4.7 only needing 1.41v max.
All I can present for results are what I recorded before or after it degraded. 4.25ghz with 1.28v was the highest point where I stress tested the fresh chip. Now that same clock takes about 1.32v to be prime stable, but it is Priority 9 10k fft stable for hours. The reason for the drop is because I drank beer and beat on it one night trying to get the most out of some 3dmark. pfff
The gobs of voltage thing makes me cringe every time I see it! Some of those probably would have been stellar if treated properly. But to each his own you gotta do it to get the hwboints.
I'm already on the hunt for another Q745 still in the box unopened.
Sold on the Q746A but think the last 3 were 366.Quote:
Originally Posted by Mav451
The Q750A is Q750A032
When comparing you should remember also the cooling used.
Water may give you 100-150MHz or more for example.
And of course orthos stable.
On air some chips like mine can do 3.167@1.3V for 32m but that is not the case.
Quote:
Originally Posted by mrcape
Eh? What vcore and mhz caused it to degrade? I thought anything below 1.4v load was supposed to be safe?
That's the exact same batch as I've just received. Unfortunately, I won't be in a position to test it for another couple of weeks. Let me know how it goes. Good Luck .:up:.Quote:
Originally Posted by WiTcHkInG
I had it up to 1.41 - 1.42vcore max and mine got bruised. There's no clear answer to what can cause it. I'm guessing a combo of High FSB + highish vcore. There are many variables - board, other voltages, fsb etc..Quote:
Originally Posted by Falkentyne
the good> it does 3600 @ 1.19/1.20 (windows)Quote:
Originally Posted by The Viper
the bad> i'm having a hard getting it stable around 4ghz, right now i'm running 480x8.5 - 1.4125bios/1.4windows and i think i'm ok, it's prime stable(haven't tested for long half an hour only)but when i play cod4 it keeps crashing the game below that.
and i can forget about 500+fsb, maybe it's my mobo? :shrug:
it's a Q745A553 pack date>12/27/07
My 745A576 is still doing good on water after 7 weeks of somewhat harsh play. 4300mhz needs 1.375v to be solid and 1.465v for 4500, 4800 is still very bench stable with a max of just over 4900.
What are the rest of your voltages (ie NB, SB, FSB)?Quote:
Originally Posted by flesheatinvirus
Ram linked or unlinked at what settings?
What mobo?
For example running at 4300mhz on my P5K Prem board needs 1.375v CPU,1.60PLL,1.30FSB term,1.40NB,1.05SB,Clock Overcharge .90,Transaction Booster disabled,CPU&NB GTL is .59 and .61. Ram is Ballistix at 1148 4-4-4-12-3-35-6-3-3 at 2.35v on a 333 strap with static read enabled.
I have the P5K Deluxe, flesheatinvirus, and I notice you have the Transaction Booster disabled. With the newest bios 809, with TB disabled the Performance Level has dropped to 9, while it was at Level 6 with the older bios when disabled. This is a big performance hit. Level 6 has about 20% lower latencies than Level 9 on my system. I would assume the similar Premium board has the updated bios available now also.
I am running at 4005mhz on my P5K Deluxe board with 1.365v cpu in bios,1.50PLL,1.10FSB term,1.25NB,1.05SB,Clock Overcharge disabled,Transaction Booster enabled 2 (Performance Level 6),CPU&NB GTL is Auto and .61. Ram is Ballistix at 1112 MHz 5-5-5-12-2-25-5-2-2 at 2.10v on a 333 strap with static read disabled.
Thanks.Quote:
Originally Posted by mrcape
Did you have it at this vcore for several hours or all night, or only briefly (for a few minutes?).
If coretemp is even remotely correct. is 60-63c well within recommended temps? This is only at 1.28v for 4.0ghz. The "CPU" temp however reads 45ish on load. i have never seen the core and cpu temp that far apart, even though they are on difference sensors.
I have similar results with air and 1.3V@4050MHz and cpu is at 46-47 and is orthos stable (on Asus Maximus Formula) so i would not worry.Quote:
Originally Posted by ThatGuy16
Well on my setup, my e8400 was orthos\prime stable at 1.4000 in the bios giving me 1.392 idle and 1.376 load. However, now i need to set 1.40625 in the bios which still gives me 1.392 idle but now load also stays at 1.392 with only very short slight drops to 1.376. Is that degrading or is that normal?
Could be some degrading happening, my 8400 seemed to have a gracefulQuote:
Originally Posted by Mumid
degradation when I was running 1.4v or more, this freaked me out so I keep it
at or bellow the 1.36 max now, and I have not seen anymore degradation.
Of course now I could only run it @ 3.8ghz @ 1.36v so I decided to put this
CPU in my HTPC @ stock frequency and voltage, and I bought a new 8400
for my main rig and running it at 3960mhz @ 1.32v, Im happy with this and
I will not go over 1.36v again. If you read the e8000 series data sheet you
will see:
1.45v is "absolute maximum ratings and lie OUTSIDE the functional limits of the processor."
At conditions outside functional operation condition limits, but within absolute
maximum and minimum ratings, neither functionality nor long-term reliability can be
expected. If a device is returned to conditions within functional operation limits after
having been subjected to conditions outside these limits, but within the absolute
maximum and minimum ratings, the device may be functional, but with its lifetime
degraded depending on exposure to conditions exceeding the functional operation
condition limits.
At conditions exceeding absolute maximum and minimum ratings, neither functionality
nor long-term reliability can be expected. Moreover, if a device is subjected to these
conditions for any length of time then, when returned to conditions within the
functional operating condition limits, it will either not function, or its reliability will be
severely degraded.
To sum it up:
1.45v is the "ABSOLUTE MAX" voltage, and is OUTSIDE the functional limits of the
processor, so damage/degradation will occur but will be more graceful.
However 1.36v is the "MAX" voltage that is WITHIN the functional limits of the processor,
so no damage should occur. (but will likely shorten the life of the proc from maybe 10 - 15
years, to say 5 years.)
Anything over 1.45v will severely degrade your CPU.
If you are planning on keeping your CPU for a while then keep it
AT OR BELLOW 1.36v.
Oh, and I know that some have had the vcore at > 1.4 for a long time
and have seen no degradation, they either have a gem chip, or they have just not
noticed the degradation yet.
Good Luck:up:
Been working on my OC a bit more, got it at 4303 1.36v idle,1.328v Load. Passed 10 minutes 10kfft's so far,(Orthos), more testing today, and a SS to come later.
Question for all who know more than I,( which BTW includes too many) :) Clockgen Voltage.... Exactly what does it do, and has anyone needed to raise it at say 9x478 or lower? Thanks in advance.
Larry
I don't think anyone's really tried messing with it yet.
Quote:
Originally Posted by flesheatinvirus
What is the fucntion of clock overcharge? I have this option in my p5k-e bios, but have left it alone.
Clockgen Voltage (I would suspect) is the same as PLL voltage which wouldQuote:
Originally Posted by Big Lar
be the voltage of the clock signal being sent to your CPU. So if your FSB is
set to 478mhz then your clock signal alternates from low ~0v to high 1.50v
(standard intel PLL signal voltage spec.) 478 million times per second. Raising
this > 1.50 can help with clocking the FSB higher, but from my experience
it's only marginal at best, and it's risky to play with since too high of values have shown to degrade CPU's faster that anything.
Good Luck
Thanks, I havn't messed with it yet, I have another setting for VTT, which I thought was the same as PLL? My VTT voltage is default 1.1v shown in bios as 1.12v. I did up that to 1.13v which shows 1.15v in bios voltages. I have read that 1.15v is the max reccomended for VTT, and as I am only testing, I hope it will be OK.Quote:
Originally Posted by CrazyNutz
Just trying to figure out what the Clockgen Voltage Exactly is. Thanks :)
Larry
No VTT is your FSB termination voltage, I am getting best results with this at the intel default of 1.10v. Tweaking VTT/FSB term normally involves tweakingQuote:
Originally Posted by Big Lar
GTL Ref voltages to get the best results.
Still testing one new toy :shocked:
4200@1.29V over 30min Orthos stable ..i'll go higher 24.5* ambient , so load temp are rather high :eek:
http://img442.imageshack.us/img442/9...129vwe4.th.jpg
Edit: 4250@1.29V /500*8.5/ still no errors :shocked: :shocked: :shocked:
http://img527.imageshack.us/img527/4...129vwc6.th.jpg
Quote:
Originally Posted by CrazyNutz
Thanks! I have been messing with GTL's as well, tho on this board the only settings are 57/61/63/67 for CPU GTL's, and 61/67 for the NB GTL's. I found my best so far as 63/61/61.
Took a SS of 15 minutes or so of 10k FFT's, hopefully it shows correctly. Will run Blend overnight.
Larry
http://img229.imageshack.us/img229/1...tt11uh5.th.jpg
Quote:
Originally Posted by mk-ultra
well i have to retract my bitterness toward my CPU :P
it just did 9H of prime2004(2 instance) @ 470X9 @ 1.325(bios) 1.310(dmm) 1.312(everest) :clap:
it just needed more NB voltage, i'm running 1.41 right now and i put an old amd cpu fan on my heatpipe system and it's just a bit hot to the touch :yepp:
this is much more encouraging results
i also tried some prime @ 500 fsb and it ran for 10 minutes, usually it failed within 15sec, it just sux i don't have good divider for my ram near 500fsb
what should i keep my voltage under on my e8500??
In my opinion, i wouldn't go over 1.35v for air (24/7 use). I made my limit 1.4v for benching..
But, thats just me :shrug:
Hi,i have a P5K DX with E8400,have a setting for this motheboard?I want set with 500 FSB.
Thank's
From what I understand its another voltage tweak in addition to the CPu Vcore that allows your cpu to draw even more current then your vcore value set in the bios when under heavy load. You can go up to 1v when needed but you also really need extreme cooling to compensate for that nice little feature as things can get scary real fast. IMO it was designed for use when you have Phase or Dice cooling on the Prem to increase stability under serious clocking conditions. The Prem was made for water cooling anyway. Run it low for performance and raise it for high clock stability but make sure you have some serious cooling. Im running my Wolf 8400 in my Mega test Stacker rig which has seperate high flow oversized loops for the CPU and card with multible rads so I can take advantage of that feature without potential issue. Leave it on Auto or at the bottom of the scale.Quote:
Originally Posted by NINaudio
Thanks for that :) I think my cooling could probably handle a heat spike, but who needs it for everyday stuff :DQuote:
Originally Posted by flesheatinvirus
Larry
guys and the passion where is? ... If it breaks shall endeavour to buy another,remove the pleasure of seeing high numbers?, use it,try it, this is a much stronger addiction.
I today would not be armed with a system default, I know there are all kinds of users, but at least acknowledge that type of user I am, I think it is not wrong to say so.
Well, i screwed my E8400.. It cant do 4.02GHz (1780QDR) anymore.. used to do 8hrs stable of OCCT and Prime and now it wont do 2minutes... God damnit! Im at 3.83GHz, but wow i cant believe it degraded :(
Quote:
Originally Posted by DStealth
EXELLENT !
what batch # please
Quote:
Originally Posted by hersounds
BAHAHHAHAA :up:
What voltage were you on?Quote:
Originally Posted by Furiøùs
46 week , not sure about other digits, cos it's mounted and has no box case to look at ;)Quote:
Originally Posted by HDCHOPPER
It's one hell of a chip there, i'm shocked :shocked:
Still in testing process :
4465@1.384V Primeing /set in windows, so coretemp is not reading right freq./
http://img166.imageshack.us/img166/8...138vdq8.th.jpg
and now i'm upping:
4500@1.41v :shocked:
http://img443.imageshack.us/img443/6...1416ap7.th.jpg
Great chip man but from experience, you might not want to run prime up over 1.4v..
With last one was running more then a month @ 1.55-1.57V load volts @ 4400mhzQuote:
Originally Posted by mrcape
So i'm sure what to do, and belive it or not there in no degradation, just those chips want to warm up, before get fully stable at it's limits ;)
Right now i remounted my block and look what we've got here :shocked:
4545@1.42V and only 62-63* load temps Wow
http://img117.imageshack.us/img117/1...1424he8.th.jpg
4545@1.42V more than hour Prime 25.6 build6 /x64/ BLEND - more than enough for my needs ;)
http://img98.imageshack.us/img98/416...lastwl9.th.jpg
Are you saying there's a break in or burn in phase? I was wondering about that. Because both of mine ran better (higher clocks with less voltage) for the first days at lower settings, then after I took them up over 1.4v they needed slightly more vcore at all clocks..
Quote:
Originally Posted by DStealth
Damn, you seem to have a golden hand picking up cpu's!
Very nice one again. :up:
dstealth i envy you, what coolinig?
:up: THKS
Nice chip :up: Can't wait to see a 8 hours prime/Orthos screen :)Quote:
Originally Posted by DStealth
this is some very nice chips...
well done!!!
as it seems all 8xxx can run stable until 60-70 C at full load...
after that no orthos...
There is not such an option :)Quote:
Originally Posted by DemonEyez
I don't have time to wait more than 2 hours and for my needs, that's far beyond stable...
Here is the last screen before, turning off the copmuter and go to work:
http://img212.imageshack.us/img212/5...ast2zz2.th.jpg
Tonight i'll do some more tests, for the moment that's my result 1h30min Blend and stopped @4545mhz 1.42v load ..1.4125 set in Bios :up:
I'm using crappy WC with very weak auto radiator + 2*120mm (70cfm) and MP05SE LE block and also EK8800 GTX Voltmodded in the loop, so any good TR120X can beat it with 2*fans over 70-80cfm :rofl:
If it's on Auto, does it stay off? The lowest option for it is 0.70v. That's the last thing I need pumping through my cpu on air! :eek:Quote:
Originally Posted by flesheatinvirus
Anything over 1.36v and you run the risk of degrading your CPU, the first oneQuote:
Originally Posted by mrcape
I got did the same thing, I started off under 1.36v and 3.9ghz all was good
then I got the itch to go higher, and went with 1.41 to get to 4.0ghz all seemed well 6 hours prime stable then left it on over night ran prime the next day and Wham-O!! Not prime stable anymore not even 10 minutes :(.
So I thought ok I'll just go back to the 3.9ghz and keep it under 1.36v again.
Wrong!!! Now the very best I could do was 3780mhz at 1.36v. So there
you have it.
Also I must add there were few times I had the vcore up to 1.44v (<10mins)
but never >1.45v.
Depends. If you want to minimize the risk of degrading your CPU then keep under 1.36vcore.Quote:
Originally Posted by Origin_Unknown
If you don't care and are just interested getting some awesome low PI times then go >1.36v, but be prepared to drop some cash on a new CPU.
Well that's what I was saying in my first post to him warning him not to prime over 1.4v. Like I said I have two chips that seem to have degraded. If you read the whole thread, I've detailed both of mine quite a bit already. But DStealth seems to think it's some sort of phase like a burn in period, and not an indication of damage.Quote:
Originally Posted by CrazyNutz
A lot of people are doubting that these could degrade. I'm still not sold either way, but one thing is for sure that the chips don't do what they did at first, high clocks with ultra low voltage. Whether its degradation or a break in is what's of interest to me. I'd like to hope it's the latter as DStealth thinks, because after the initial change mine have been solid. Then again I don't know DStealth or why if and how he's certain about it.
Interesting about the burn in. I'll test this theory on my new e8400 that hasQuote:
Originally Posted by mrcape
never been past 1.33vcore. I will burn it in with prime95, and some video
encodes over the next couple of days, what do you think 48hours worth?
UPDATE: wow, ok this my be too soon but my new e8400 is not 10k prime stable anymore, crapping out in less than 5 minutes.
Seems the DStealth Break in phase theory may hold some water. More testing.....
UPDATE2: Ok, Im seeing something I thought I had see before with my fist e8400. I left my pc off last night to let the TIM cure (per AS5 recommendations)
and note that yesterday I was blend prime stable for 7 hours and then I 10k prime stable for at lest 1 hour before I shut it down.
So today I fired up my pc (and did not run any torture test) and jumped on this thread. I read your reply and started testing
the break/burn-in theory I started with 10k prime and bam rounding error in less than a minute, I then ran it again, rounding error
happened after about 4 minutes, ran it again and still going after 30 minutes.
It seems like it needs to warm up to get stable.
Also I just did a little research on the break-in/burn-in theory, and from what I see it's supposed to make your cpu more stable.
Let's hope so. Mine seems to have leveled off, meaning now it passes the same stress tests as it did two weeks ago. Of course, it still won't do as well as it did in the beginning.
I still can't help wondering if the benching I did at 1.42v with 545fsb did any damage to it. It was after that night that it needed more juice to be stable at all of my recorded clocks. If it turns out that it is a break in phase, I'll be very glad. Actually, any definitive answer to this change would be great.
Last try on that Vcore :
4563mhz@1.42V :
http://img152.imageshack.us/img152/2...3142br2.th.jpg
There was an error after an hour and some minutes ..it's a pity i didn't catch the right moment :(
No problem - it was normal, not to be stable with such low Vcore at that speed ...with 24* ambient and crappy WC ;)
Well mine is still 10k priming 3 hours so far so good. Im going to shut it downQuote:
Originally Posted by mrcape
for about an hour, and start it back up again and run 10k prime to see
if I get the rounding errors again.
To day I orderd a 8400. Hurray. Hoping at a real performance boost from my 2160 at 3,6 Ghz . 1 mb cache to 6 mb he, he. And 45 Nm too, really looking foward to this upgrade
Also seen that 4 Ghz is avalible with most batches. Am I right?
Should be really easy to hit 4G.
Bios settings and ram timings can make a huge difference in stability.
Go easy on the voltages.
And congratulations!
Just picked up a e8400 at frys for $199 batch q747a258 any luck with this batch?? Also looking for tips on a solid board to get 4.0 on? Thanks guys.
Quote:
Originally Posted by ThatGuy16
1.425 on eVGA 780i in bios, 1.39v on idle, 1.36-1.37 underload
Well oddly enough i got it stable again at 1780QDR with 1066 on the ram.. Higher then i used to, ram used to be at 800, but i put 0.5 on GTLVREF Lane 0 and now its going strong for 40min so far.. Real wierd. I wish i knew how to tweak these GTLVREF lanes because if so i can probably go so far with this chip.. hmm
GOD DAMNIT speak of the devil it just failed after i finished typing..
is correct a different temp in core 0 and core 1??? (idle)
http://img387.imageshack.us/img387/5497/tempnq9.jpg
cooler: XP120 + panaflo 120
mother: ip35pro
Ouch, 15 degree difference. Difference between the 2 cores is often somewhat different with these Wolfdales, but 15 is one of the worst I have seen. I would try remounting the cooler and re-applying thermal paste, although you may have a faulty sensor in one of the cores, or just a huge difference for some reason which you can't help.Quote:
Originally Posted by pervi
How are the load temps? How much difference between the cores then?
I remounting the cooler and thermal past and the situation does not change.
At full load the difference is 10 degrees.
Can be the XP120 base faulty ?
You would rarely if ever see numbers like this with the previous 65nm generation but with 45nm, borked sensors seem more like the norm than the exception.
I did an interesting test where I ran the single threaded version of Prime. I ran it first on core0 of my E8400 with nothing running on core1 and then I did the opposite and ran Prime on core1 with nothing on core0. The difference in temps one way was ~1C and the other way the difference was pretty much zero. Even with a huge difference in load between cores, properly functioning DTS sensors on a 45nm dual core should be outputting almost identical temp data for both cores across the entire operating range. Your processor is out to lunch. Unfortunately, as long as your CPU runs fine at default settings, Intel is not obligated to replace it for sensor issues.
My cpu is not "the one" :S
http://www.ocforums.com/showthread.php?t=546662
don't worry about differences unless it's causing stability issues
E8400 - Q748A138
VID - 1.1125v
P5K-Deluxe - Bios 0809 - 02/15/08
Max FSB on AIR with TRUE = 560.02
http://i157.photobucket.com/albums/t45/chispy123/10.jpg
Max OC on AIR with TRUE = 4725.29
http://i157.photobucket.com/albums/t...py123/01-3.jpg
Quote:
Originally Posted by soundx98
Thanks!
Cant wait. I wonder how much more sensetive the 45 nm cpu is on vcore, my 2160 needs around 1,525 for 3,6 ghz, but then it gets very hot, up to 80 c (coretemp) under orthos with my xigmatek.
CPU: E8400
Batch #: Q747A374
Ship/Packaging Date: 02/05/08
Voltage(s) (Stock/OC'ed): 1.22 / 1.425
Frequency(ies) (OC'ed): 4.2Ghz 9 x 467
Motherboard: GA-EX38-DS4
BIOS: F3
-----
*Extra* Memory(ies) (Timing(s)) Stock/OC: 5-5-5-16 / 5-7-7-22
*Extra* Memory(ies) (Voltage(s)): 2.034
*Extra* Third Party Cooling Solution: Xigmatek HDT-S1283
*Extra* Paste(s)/Compound(s)/Other(s): Tuniq TX-2
I can boot and run SuperPI and other apps in both 4.2 and 4.05 but I can't pass Orthos for more than a few seconds. I can run at 3.6Ghz & 1.237v all day long. I know there are other settings to play around with but just don't know enough right now to feel comfortable doing it.
Quote:
Originally Posted by Obitus
Sounds great! 1.237 vcore is what I need for 2,4 ghz (stock 1,8 ghz). how much vcore do you need for 4.2 ghz and 4.05?
And what are your temps at that speed?
Heh, it says right in my results. :p: look again ;) 1.425v for 4.2. What it didn't show is 1.375v for 4.05. Load temps for 4.2 are about 62c and for 4.05 is 59c.Quote:
Originally Posted by fng77
I got a 747A377 Pack Date:02/05/08 from Fry's and It is not that greatQuote:
Originally Posted by ban916
It needed way to much voltage to get over 4ghz (>1.4v) and was not that
stable at that. I also got a 748A144 which does much better but gets a little
warmer.
Quote:
Originally Posted by Obitus
Sorry. I can se that now.:rolleyes:
But anyways, Great results I think. 4.2 at 1.425 isnt bad at all. I just hope I get a good cpu too. I could definetly live with 1.375 vcore for 4.05 Ghz.
I´m at 1.35 right now, thats what I need for 334*9 fsb (3006 Mhz)
Nice that you have a xigmatek too, then I really have somone to compare my results with. I`m gonna try to fix the money until next week, the cpu is lying waiting for me at the shop.
Found a demo ex. for sale at a hardware store here in Sweden. I got it for just 200 USD thats pretty cheap for being here.
ok, thksQuote:
Originally Posted by eva2000
do you think is the reference temperature? witch core ?
4.3GHz @1.38 15 hours prime stable.
4.4GHz @1.40 8 hours prime stable.
4.5GHz @1.45 8 hours prime stable.
All tests were done running BLEND, I run 4.3GHz for 24/7 and have never seen the "degrading" issue. I have ran this chip at atleast 4.3 right out of the box. Performance, benchmarks and stability have never degraded. With new beta bios 1004 I have actually gained a few 100 points on 3dmark
that s not so great result its an average result for those cpu..i stay daily (orthos >2hr stable ) at 4.05 with just 1.29vQuote:
Originally Posted by fng77
http://www.pctunerup.com/up/results/...95600_orth.jpg
What do you guys think is a safe voltage on air, only for bench's such as 3dmark06?
For 4.3ghz in 3dmark, it needs 1.4v in bios and is 1.36v in windows. Is it safe to go higher? i don't want to hurt my chip :(
i have always told myself max 1.4v.. but i want to go higher :p:
Quote:
Originally Posted by alcatraroz
Great!
Since you dont want hurt your chip I would stay at the 1.36 (in windows).Quote:
Originally Posted by ThatGuy16
When Intel specifies the max operating voltage of 1.3625 and absolute max of 1.45V; are they refering to the voltage inputed in BIOS or the actual measured voltage?
Thanks
Actual measured voltage ofcourse.Quote:
Originally Posted by tranceaddict
I built a new rig recently and I'm content with what I can do with it. My last rig was a MSI K8N-Neo4 Sli Platinum with X2-3200 OCed 3.2 Water (Zalman block) + Termaltake Bigwater Kit(Without cpu block, It cracked). This is the new rig OCed on Air. http://img153.imageshack.us/img153/5369/oce84002ws0.jpg
- Anandtech ArticleQuote:
Quite simply, we believe any voltage over 1.45V is asking for trouble with 45nm processors and our conversations with Intel to date have all but confirmed our suspicions.
The article also talks about Degradation and Warranties and how this affects a product life cycle. The important thing is the cross relationship between high temperatures and high voltage over long periods of time.
- Anandtech ArticleQuote:
On the other hand, perhaps precautions will be taken in order to accommodate the higher voltages like the use of water-cooling or phase-change cooling. In any case, the underlying principles are the same - overclocking is never without risk. And just like life, taking calculated risks can sometimes be the right choice.
Great article, only thing it lacked was ANY mention of how FSB Termination Voltage effects overclock stability, degradation, etc...Seems no one wants to be very forthcoming with 45nm Fabs and FSB Term(VTT) voltages differences from 65nm Fabs.
What I'm taking away from this article:
By Overclocking, there is a risk I could damage my 45nm CPU, but by Watercooling it now becomes a calculated risk because the cooling properties of Water have reduced my risk of damaging my CPU with high voltage and temps compared to those who choose Aircooling methods and use exceedingly higher voltage values and temps to achieve the same results.
ThanksQuote:
Originally Posted by CrazyNutz
so you guys think ~1.36v is the highest only for benches? (on air)
What is so different with water cooling? I mean is it that drastically lower in temps? Or is it different in the way heat is moved away:Quote:
Originally Posted by .OCX
Is it b/c the heat is dissipated more quickly?
Smoother b/c it's a moving liquid instead of air?
And what does air cooling have to do with "exceedingly higher voltage values"? Why would someone with air be using more voltage than a water cooled CPU?
Theres a lot of sticky threads on this forum that explain most of your questions with regards to aircooling vs. water. But for the 45nm example:Quote:
Originally Posted by Mav451
Typically...
4.0ghz:
Aircool 1.35v-1.40v
Temps: 60c+ Loaded
4.0ghz:
H20 Cool: 1.26-1.30v
Temps: 40-50c Loaded
This is generalized data that I have noted on countless Orthos/Prime/OCCT stability screenshots that folks have graciously posted. The 45nm Database you put together, although valiant, unfortunately had several flaws which invalidated most of the recordings. Specifically, the stability testing/methodology and the validity of each user's admission. Without that control measure in place, the screenshots of stability testing is really all there is to go on.
Sure, there will be those who say "But I can achieve 1.324v on Air to hit 4.0ghz" or something along those lines. There will always be standard deviations when collecting data, and especially when generalizing data to make inferences based upon those conclusions. But the fact remains the same, using more energy to achieve the same results as someone who uses less, ceteris paribus, is an inefficient use of resources, and couldn't possibly be adopted as a "Best Practices" policy or guideline for scientific use. Not to mention the "Calculated Risk" factor involved with 45nm technologies.
i have an e8500 that does 4ghz (8x500) w/ 1.275 volts... How is that?? I will post some screenies later.
Something doesn't sound right about that. Just b/c you use a different method of cooling, doesn't mean that the processor isn't going to overclock as well. I think the other factor you aren't considering is that they are dramatically less people using WCing. And yeah, my database has bad data b/c I didn't set a standard for the OCs. What I should have set as the baseline limit is 1hr OCCT - which eliminates those useless SuperPI OCs.
I think they are many users who've already posted in this thread that have 4Ghz with <1.3v - and all of us are on air. I still think the biggest deal with these chips is a good batch, not your method of cooling. Frankly, concluding that b/c you're using WCing guarantees a .09v drop in required vcore is just plain bogus. I understand you like WCing, but to make a claim like that is just ridiculous.
please have a look in this thread: http://forumdeluxx.de/forum/showthread.php?t=457105Quote:
Originally Posted by .OCX
my E8200 Q748A230
http://img120.imageshack.us/img120/2...012hcu1.th.jpg
cooling: Freezer 7 Pro (Air)
ram: 2x1GB Teamgroup Elite PC6400
mb: GA-P35-DS3L
psu: corsair 450vx