Yea, I'm actually content with 3.2ghz on my E6400. I could probably push it a little higher with more voltage, but I just don't really want to run it balls out for 24\7 :p
Yea, I'm actually content with 3.2ghz on my E6400. I could probably push it a little higher with more voltage, but I just don't really want to run it balls out for 24\7 :p
same here my E6300 is prime stable with high and medium fan speed at 3.6GHz but all i need out of 24/7 is 3.2Ghz..........that's plenty
My question, sorry if this has already been posted... how does the strap set in relation to the multi...
Meaning, say im running e6400 at 7x, 399fsb, am i still on the faster settings, OR, am i at the strap made for 400+ (unless i misunderstood FCG, the chipset should be running at 456 or so)...
What i mean, does the strap set for your FSB or NBCC.
Ah this info makes me feel better about crapping out at 424x8. I have Corsair 6400 (C5, the cheap stuff) and that's a 22mhz overclock at stock voltage (1.9.)
But from this I take it I should be able to boot into windows at 424...I got a big ol' BSOD even with a RAM voltage bump to 1.95. BTW, I leave SpeedStep enabled, as you can see...Doesn't make a bit of difference. Might as well leave it on and save some electricity.
Nice for cheap cooling - Arctic 7 Freezer Pro. And I can hit 3.2 on stock voltage (1.35 droop to 1.32).
sluzbenik you using this asus mobo?
your RAM maybe reaching the limit have you tried 2:3 divider on RAM to see how high it will reach
Yeah I have a p5b deluxe. I haven't played much with the dividers because they were so troublesome.
I actually just booted into 320x8 with 4:5 dividers, it seems stable, unlike the last BIOS. However when I set to 4:5 in BIOS and hit exit, it froze. I had to power off and unplugged to let Asus CPR do its thing but then it booted straight to Windows with the new ratio anyway...Strange.
Seems likely 422 is my max...Will bumping the voltage on these help? If i'd known I would be able to do 3.2ghz with stock vcore I woulda bought better RAM! I had no idea this chip would OC so well...
Trying to replicate or test out this but on P5W DH with E6700.Originally Posted by Tony
bachus
Here is the test for you. Clockgen up to 427 from 400 fsb and run 32M pi, then boot in at 427 and run 32M pi.
I bet we see a 1min faster run using clockgen
Someone needs to do this under LN2, i bet with the right tweaks we could see 8sec 1M easy
I ran 1:1 with 4-4-4-10 timings for all tests.
Booted at the following 4 settings:
- @10x400fsb = 4000mhz
- @10x402fsb = 4020mhz
- @10x420fsb = 4200mhz
- @10x400fsb clockgen to 420.3fsb = 4203mhz
Ran Super Pi 32M and then in same windows session ran Everest Ultimate Edition v3.01 twice.
Super Pi v1.50 32M test
@10x400fsb = 4000mhz vs @10x402fsb = 4020mhz
vs
@10x420fsb = 4200mhz vs @10x400fsb clockgen to 420.3fsb = 4203mhz
vs
Everest Ultimate Edition v3.01
Ran each setting twice:
@10x400fsb = 4000mhz
@10x402fsb = 4020mhz
@10x420fsb = 4200mhz
@10x400fsb clockgen to 420.3fsb = 4203mhz
Not much difference, 4203mhz results probably slightly faster due to extra 3mhz clock compared to 4200mhz.
Maybe P5W DH has different points at which bootstrap changes and it ain't at 400fsb or 420fsb ?
---
eva the best way to find out quickly where the points are Tony and Kris are talking about is to basically boot to 1.65 memtest from say 300MHz in 10MHz increments and fix all the memory timings particularly TRAS & TRFC as they affect bandwith a lot and TRFC on DS3 was default auto in bios and some of the bandwith changes were enourmous until i realised what was causing this
anyway it would be interesting if you could do what i suggested
300MHz boot with memtest.....reported bandwidth
310
320
330
.....
460
(just memtest all the other testing would take 10xdays to complete lol)
same as all the other 965 mobo users......
Edited for OT content
Last edited by mdzcpa; 09-10-2006 at 07:31 AM.
guess that would be alot quicker too... brb
---
Memtest86+ v1.65 doesn't seem to show memory bandwidth it mistakes L2 cache bandwidth for memory bandwidth as i don't think this is correct
E6700
10x
390fsb = 25,519MB/s
400fsb = 26,172MB/s
430fsb = 28,106MB/s
440fsb = 28,759MB/s
450fsb = 29,412MB/s
460fsb = 30,064MB/s
---
could this bootstrap change somehow be bugging the p965 pci-e to 1x as opposed to 16x for most boards? because it only bugs after a certain fsb.. and it is starting to happen alot(or actually be noticed because it made no sense before) and it would be nice to select my bootstrap anyway because i obviously cant game well at 1x and 500+fsb....
Last edited by vintage_guitar; 09-09-2006 at 05:04 AM.
and there she is....I'm on it and will be back in a few
UPDATE1: I was a bit too optimistic and dinos22 is spot on... I can't get my system to run 32M at 427MHz booted from 400MHzIt shuts down the moment I start SPi calcualtion! I will try 415MHz and perhaps this will at least allow me go thru few passes...
UPDATE2: Unfortunately, 415Mhz was no-go either, therefore 410Mhz will have to do, Tony
That'd be 43s difference, enough to cry over
you're getting the tighter chipset latencies set at the lower 1066 strap while overclocking your NBCC to very high levels even at the next strap up (1333). the difference as you can see is incredible....43s for only a "10Mhz" delta. if we could do the same @ 427 you would be floored with the change! 427 may be possible when giving the NB a lot more volts...
-FCG
@Kris
I think its time we hit them with the excel spreadsheat of all the NBCC Vs CPU FSB etc, im sure it will answer a ton more questions.
@ALL
Its clear to me the 975 and 965 should act the same way, if the boards had similar bios files i actually think they would act just the same but obviously they don't. 965 seems to have increased overclocking headroom on the higher straps. You have already seen from Bachus post 10fsb difference with clockgen gains you a full 43'secs worth of speed which is nothing short of incredible, this means we would have seen close to 2 mins gain at 427 if his rig was stable
AMD overclocking has us all working with 3 parameters, HHT, LDT and Ram speed, Intel is NO DIFFERENT, people who though it was should plainly see it is not now, also all those who complained they could not do 1:1 with OCZ (or other brand) memory you now know why, and all those who recieved an RMA count your self as real lucky, as which ever company who supplied your ram may not be giving RMA's now this info has gone live. You all need to learn the effects the chipset clock and latency has on the ability to overclock and work around it.
Got a problem with your OCZ product....?
Have a look over here
Tony AKA BigToe
Tuning PC's for speed...Run whats fast, not what you think is fast
So the strap is set by the FSB and not the NBCC frequencies?
The strap is set by the BSEL pins, this does not mean bios can not manipulate it though.
Got a problem with your OCZ product....?
Have a look over here
Tony AKA BigToe
Tuning PC's for speed...Run whats fast, not what you think is fast
Yeah, from what this thread is saying the strap changes according to FSB, well what if you are running on a lower multiplier and fsb and nbcc are not equal, does the strap change when nbcc goes over 400 or when FSB goes over 400... Hope this question isnt too hard to understand, ill try and word it better if you need.
I think the answer to this question is fairly obvious: the strap changes based on the NBCC, not the FSB.
How do we know this? Well, the NBCC is set when the system boots....when the default multiplier is detected, when the BSEL pins report the current default strap for the detected CPU, and when the currently selected multiplier (via BIOS) is set.
This in turn determines the correct strap for the NBCC which forces the setting of associated MCH latencies. The only other way to change the strap, insofar, once the system is running is to change the multiplier in Windows (CrystalCPU, C2MM, etc.). Simply changing the FSB (ClockGen, SetFSB, etc.) causes the FSB to increase - raising the overall NBCC overclock and raising final DDR2 speeds - but does not modify the strap/associated latencies.
Bachus has shown this simply by booting at 400FSB, entering windows and using ClockGen to change to 410FSB....he then achieved a 43 second drop in SPI 32m over booting straight in at 410FSB!
Since Bachus is using an E6600 with a multiplier of 8x:
(9/8)*400 = 450MHz NBCC w/400Mhz FSB (1066 strap?)
(9/8)*410 = ~461Mhz NBCC w/410MHz FSB (1333 strap?)
but...
(9/8)*400 = 450Mhz NBCC w/ClockGen to 410 FSB yielded the 43s drop in SPI 32m...
I think we can probably assume that one of the inflection points for setting the next higher strap on the Asus P5B Deluxe is in the 450 - 461MHz range.
-FCG
Last edited by freecableguy; 09-09-2006 at 08:37 AM.
thank you for clearing this up for me.
hummm I tought that the strap change was occuring between 399 to 400, because there's a huge change when people using the default multi of the processor cross that limit...
so with an E6400:
8/8 = 1 x 399 = 399 NBCC
8/8 = 1 x 400 = 400 NBCC = strap change
EDIT: I see, probably there's a change in 399 to 400 and another change between 450-460... so everything is correct...
Last edited by fscussel; 09-09-2006 at 09:17 AM.
Dell X300 1kg Dothan superb machine =)
Soyo 19'' LCD.
The strap on the MCH is changing at 400fsb, its being reset to the 1333 strap which should start at 333fsb but Asus choose to allow an overclock on the chipset all the way to 399fsb.
Once it hits 400 the chipset is strapped onto 1333 but its internal latency is locked to the 1066 strap. This makes 400fsb possible due to the lower NBCC with good memory performance. The only issuse is the NBCC is already higher due to 400fsb and not its base 333, so when using clockgen you are on the 1333 strap but with the tighter latency...memory performance is completely linear this way from 267fsb but you will struggle to get much over 410fsb it seems stable.
So this means with a lower NBCC we need an extra value in bios for the NB Latency which would allow for some quite spectacular memory performance but you would need to keep an eye on the NBCC as even a moderately high clock could dial in instability.
Ofcourse Asus could be real clevor with the next bios upgrade and change the strap at 333fsb instead of 400 but leave it on the 1067 latency all the way to 400fsb where they then just change the latency to the 1333 setting. It would give those wishing to use higher multipliers on the CPU an awesome injection of memory speed from ddr667 and up on 1:1.
T
Got a problem with your OCZ product....?
Have a look over here
Tony AKA BigToe
Tuning PC's for speed...Run whats fast, not what you think is fast
@Tony & FCG,
Here's something for you guys to scratch your head over
I ditched 4:5 ratio and decided to go for 1:1. As you can see, I can Clockgen from 400MHz to 450MHz and beyond that. I should have known better, as 4:5 needs some work anyway. But results are very interesting, don't you think?
Code:Boot @ below (DDR2-533 ratio, 1:1): 420x8 426x8 432x8 444x8 450x8 15:16.391 15:03.422 14:51.141 14:26.969 14:15.218
Code:Boot @ 400x8 (DDR2-533 ratio, 1:1) and raised using ClockGen to: 420x8 426x8 432x8 444x8 450x8 15:27.062 15:12.750 15:00.031 14:34.296 14:24.125
UPDATE1: Another set added, booted at 375x8 and then raised:
Code:Boot @ 375x8 (DDR2-533 ratio, 1:1) and raised using ClockGen to: 420x8 432x8 450x8 15:26.140 15:00.219 14:24.375
UPDATE2: ...one more set added, booted at 350x8 and then raised:
Code:Boot @ 350x8 (DDR2-533 ratio, 1:1) and raised using ClockGen to: 420x8 432x8 450x8 15:26.172 15:00.547 System crashed!
No loss in performance here... Even more confusing, better with straight boot
One of my General conclusions is, that dropping multiplier below default appears to be not a good idea and one should aviod that. Higher NB strap or it's internal latencies at higher NBCC or whatever it is that happens, must really impair memory performance. Otherwise, I can't explain how 450x8 DDR2-900 8-3-3-3.0 can be slower than 400x9 DDR2-800 8-4-4-4.0
Last edited by bachus_anonym; 09-09-2006 at 03:45 PM.
Strange indeed...
This thread will answer many questions though!
Project ZEUS II
Asus Rampage II Extreme
Intel I7 920 D0 3930A @ 4.50GHz (21 X 214mhz)
3 x 2GB G.Skill Trident 1600 @ 1716MHz (6-8-6-20-1N)
2 x Asus HD 6870 CrossFire @ 1000/1100MHz
OCZ Vertex 2 60GB | Intel X25-M 120GB | WD Velociraptor 150GB | Seagate FreeAgent XTreme 1.5TB esata
Asus Xonar DX | Logitech Z-5500 | LG W2600HP 26" S-IPS LCD
Watercooling setup:
1st loop -> Radiator: 2 x ThermoChill PA120.3 | Pump: Laing DDC-3.25 with Alphacool HF 38 top | CPU: Swiftech Apogee XT | Chipset: Swiftech MCW-NBMAX | Tubing: Masterkleer 1/2" UV
2nd loop -> Radiator: ThermoChill PA120.3 | Pump: Laing DDC-3.2 with Alphacool HF 38 top | GPU: 2 x EK FC-6870 | Tubing: Masterkleer 1/2" UV
Assembled in Mountain Mods Ascension Trinity
Powered by Corsair Professional Series Gold AX1200
These are my findings. I believe that the 1333 strap is set at 380 mhz fsb if using the 1:1 ratio. The reason is if I set fsb to 380 or higher I get a double restart on the board. If I set it to 379 or lower it restarts normally. This is using bios 0614. Hope this helps.
Setting fsb to 379 or lower could be beneficial to people running water cooling so you don't have to worry about your pump double starting.
Last edited by adamant415; 09-09-2006 at 01:01 PM.
P182
E6400 @ stock
Asus P5B Deluxe
8800 GTS 320 mb
G.skill PC6400 2x2 gigs
CL x-fi xtreme music
PCP&C Silencer 750
3 x 160 gb 16 mb cache WD r.e. hard drives (raid 0)
Dual Layer burner
Ultima 90
Vista 32
Coming soon: 4x4 or penryn, another 4 gb's of memory, and Vista 64
Maybe You check x7 multi ? egz 7x514 1:1 (or You Did it)@Tony & FCG,
Here's something for you guys to scratch your head over
I ditched 4:5 ratio and decided to go for 1:1. As you can see, I can Clockgen from 400MHz to 450MHz and beyond that. I should have known better, as 4:5 needs some work anyway. But results are very interesting, don't you think?
Code:Boot @ below (DDR2-533 ratio, 1:1): 420x8 426x8 432x8 444x8 450x8 15:16.391 15:03.422 14:51.141 14:26.969 14:15.218
Code:Boot @ 400x8 (DDR2-533 ratio, 1:1) and raised using ClockGen to: 420x8 426x8 432x8 444x8 450x8 15:27.062 15:12.750 15:00.031 14:34.296 14:24.125
No loss in performance here... Even more confusing, better with straight boot
One of my General conclusions is, that dropping multiplier below default appears to be not a good idea and one should aviod that. Higher NB strap or it's internal latencies at higher NBCC or whatever it is that happens, must really impair memory performance. Otherwise, I can't explain how 450x8 DDR2-900 8-3-3-3.0 can be slower than 400x9 DDR2-800 8-4-4-4.0
Very strange mobo
My Bad Axe is simple
Strap 1067 and all work like it should (4:5 and 2:3 div too)
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