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Asus rampage - "cold" vs "warmed up" board and overclocking

post #1 of 17
Thread Starter 
I've observed rather unusual behavior of my motherboard, while trying to find stable settings at 472x7 with PL:8 vs PL:9 . My configuration:
  • Old E6400 with TR Ultra 120
  • Asus rampage formula, bios 403 (with replaced el-cheapo double sided sticking tape for some real thermal compound - got -6C this way on NB)
  • Corsair 2x1gb 6400c4 (v2.x - promos)
  • Corsair 2x1gb 6400c4 (v6.x - psc)
Originally I thought I found stable settings with PL:8 at mentioned fsb and multiplier, although at pretty high NB voltage (1.67). I was experimenting when the computer has been on for a few hours. Started 2 prime95s, small i/o stress test, Rthdribl for a bit - it seemed stable, so I left them for 20 hours (sleep, work) - when I came back to it - no errors, all was fine.

But then I repeated the prime95 after I turned PC on in the morning next day (so it was powered off for a good while) - now primes were failing like crazy, within minutes. So I thought WTH. I backed off to PL:9, left pimes again, came back - all is fine. Out of curiosity, switched to PL:8, primes for few hours - all is fine again, no errors.

And this pattern always repeats (tried 6 times already) - when my PC is after a longer period of being turned off ("cold" as mentioned in subject), there's no way I can get it stable at "only" 1.67 and PL:8 (I tried plenty of combinations of different other settings, but they give no visible effect - for reference it was with vtt 1.36, pll 1.56, fsb strap 333 (400 of course tested as well, the same results), memory 1:1 @5-5-5-15, ct: stronger). But when the PC is "warmed up" - it's almost rock stable.

"Almost" - because I did tests with GoldMemory as well (I find it much superior to memtest, it finds errors far, far faster). In "cold" situation - it was literally stuffed (>200 page history when I got back home) with errors, nonetheless - practically all of them happened early (first hour). Yesterday I tried it with Gold running for 7 hours but in "warmed up" scenario - it had only 4 errors total. As you can see, it confirms prime results (failures within minutes vs. 20 hours with no errors at all).

Now I wonder - what can be actually responsible for this type of behavior ? Any more experienced overclockers that have seen something like that ? Some self adjustment done by the board after running for some time ? Low temperatures (!?) ?

BTW - at PL:9 and 1.51v the board passes tests regardless of when they were started.
Edited by msoltyspl - 5/31/08 at 1:54pm
    
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post #2 of 17
Strange indeed, I try your setup on my Rampage Rig and I need 1,71 to by stable at 472 7 3,304 944 5-5-5-15. I tried 1,61 and run Prime95 Blend test and ATI Tools 3Dview, but the two instance of prime didn´t sync, so it seems like it has to be between 1,61 - 1,71 to be stable.

Seems like we are in a boarderline here because if I try with moderate I can go down with NBvolt.

I gonna turn it off for the night and try to start it with 1,67 PL8 tomorrow.

I´ll be back
Edited by Ghostleader - 5/31/08 at 1:28pm
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post #3 of 17
Thread Starter 
I haven't tried with voltages higher than 1.67 on NB yet. TBH, I'm not sure how safe it is. Before I replaced cheap tape with decent thermal compounds (ZM-STG1 and Arctic Ceramique on mosfets) under mobo's heatsinks, I had NB temps hitting 59 at the unstable setup (and when cpu under load runs cooler, something feels not right ), Now it's ~ 53 - 54 (under load). Basing on what I've read, it still seems a bit high.

For the reference - precise setup from overclocking page (of the weird unstable setup):

ratio: 7, strap: 333, fsb: 472, pcie: 100, timing: 5-5-5-15 (rest auto), static control: auto, aic twister: stronger, booster: 8, cpu: 1.45, calibration: enabled, PLL: 1.58, NBv: 1.67, ram: 2.16, vtt: 1.38, the rest - auto.

As for your earlier questions - yea, dram static is set on auto. What exactly does it control ?
Edited by msoltyspl - 5/31/08 at 2:55pm
    
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post #4 of 17
Quote:
Originally Posted by msoltyspl View Post
I haven't tried with voltages higher than 1.67 on NB yet. TBH, I'm not sure how safe it is. Before I replaced cheap tape with decent thermal compounds (ZM-STG1 and Arctic Ceramique on mosfets) under mobo's heatsinks, I had NB temps hitting 59 at the unstable setup (and when cpu under load runs cooler, something feels not right ), Now it's ~ 53 - 54 (under load). Basing on what I've read, it still seems a bit high.

For the reference - precise setup from overclocking page (of the weird unstable setup):

ratio: 7, strap: 333, fsb: 472, pcie: 100, timing: 5-5-5-15 (rest auto), static control: auto, aic twister: stronger, booster: 8, cpu: 1.45, calibration: enabled, PLL: 1.58, NBv: 1.67, ram: 2.16, vtt: 1.38, the rest - auto.

As for your earlier questions - yea, dram static is set on auto. What exactly does it control ?

I´m on water with my NB so even thou a give it 1,71 it´s never over 35C under load.

But back to that problem, I started my rig this morning with 1,67 and it was stable and have been for 4 hours, but I don´t have your memory or CPU.

Have you tested with PL8 and strong instead of stronger, the different between those are marginal but I have found that it can be instable with stronger and stable with strong.

Or you can try PL9 stronger and enabled some Pull Ins, example, if you run PL9 and enable all Pull Ins it´s almost as you run PL8, so if you´re not stable with PL8 you can use PL9 and try to enable Pull Ins.

I have also tested some 4x1 Kingston HyperX 1066 5-5-5-15 and with FSB 450 and memspeed 1128 4-5-5-15 PL6 moderate and they are stable but I should be ably to go PL5 when I use CAS4 but no way and I can´t use strong or stronger with PL6, it´s no boot and this I have tried with NBv up to 1,83, but 4-5-5-15 PL6 moderate it´s rock solid stable with NBv 1,41 and DRAMv 1,90.

If I try FSB 432 I can reach 1150 5-5-5-15 PL6 strong and with FSB 480 PL7 strong and rock solid stable.

So there is a lot of if when we try to OC those system and we don´t understand all of it, the best answer to your question are that your are at the edge for those at PL8 and sometime it works okey and sometimes i don´t.


About Dram Static.

Here´s from Anandtech review of ASUS Maximus Formula SE: X38 and DDR2 Unite!

"DRAM Static Read Control:
This function is best set to "Disabled" for high FSB levels (450 FSB upwards). "Enabled" gives a small gain in memory access latency at the expense of overall stability. We believe this setting alters a single TRD phase to low; performance advantages either way are not stellar."


and here´s from Anandtech review of ASUS Maximus Extreme - the Extreme Benchmarker's Choice?

"DRAM Static Read Control and DRAM Dynamic Write Control: Both these functions are best set to 'Disabled' for overclocking. We could not substantiate any significant memory bandwidth or latency gains using the 'Enabled' setting. Further, setting 'Enabled' may actually hinder overclock success."

I run it always disabled because I have found out that it makes the system a little more stable.
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post #5 of 17
Thread Starter 
Thanks for answers. I guess I'll keep experimenting a little bit more, along with some of the stuff I've left on auto. It'll take a while, as the window for test is pretty narrow

The settings you have listed are pretty impressive. If you don't mind asking - what are the PLL and VTT of the settings you've listed ?
    
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post #6 of 17
Quote:
Originally Posted by msoltyspl View Post
Thanks for answers. I guess I'll keep experimenting a little bit more, along with some of the stuff I've left on auto. It'll take a while, as the window for test is pretty narrow

The settings you have listed are pretty impressive. If you don't mind asking - what are the PLL and VTT of the settings you've listed ?
For 450 9 4,05 1128 4-5-5-15 I set CPU PLL 1,50 and FSB Term 1,40.

For 432 9 3,88 and 480 8 3,84 1150 5-5-5-15 I set CPU PLL 1,50 and FSB Term 1,40.

I set PLL 1,50 and FSB Term 1,40 when I go from stock and OC and I can go up to 500 8 4,0 or 475 9 4,275 with it.

I always set all volt settings to manual and I always change one at a time to see what happens because I feel that I have more control over things then.

Good luck with your tweaking
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post #7 of 17
Very helpful posts Ghostleader - now why do i not have a e8400 when i see these sort of posts - and why does Ghostleader not have these settings for a Q6600 [do you? ]
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post #8 of 17
Quote:
Originally Posted by scottath View Post
Very helpful posts Ghostleader - now why do i not have a e8400 when i see these sort of posts - and why does Ghostleader not have these settings for a Q6600 [do you? ]
I mostly do games and therefore I chose E8400 and because it´s easier to OC E8400, runs cooler, less amps from wallsocket, larger cache and 45nm.


The biggest different between quad and dual is that you put more stress on that NB but other then that you should be able to use the same setting.


What settings are you looking for, can you be more specific?
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post #9 of 17
Looking to get my quad above 3.6ghz stable
Am using this persons settings atm:
http://www.xtremesystems.org/forums/...postcount=5415

Rest of specs in my sig
what should i set the other voltages to - as just raising the CPU voltage isn't helping [i've even tryed up to 1.75v - only for 3 minutes] to get to the 4ghz mark - i can 3dmark at 3.96 - but my cpu score is only just higher than at 3.6ghz - gfx cards get a boost still though
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post #10 of 17
Do you mind sharing all of your voltages?

Vcore
CPU PLL Voltage
NB Volts
FSB Termination Voltage
DDR Ref voltages

I'm sure you've notice that this board overvolts memory by 0.1V ...
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