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post #301 of 397
Every chip is different as to what it can safely take. I suspect Miahallen would say that as long
as you're happy with the temps then it doesn't really matter, the chips has its own protection
mechanisms if things are getting dicey.

I like Miahallen's approach TBH, namely decide what your goals are and if you achieve them
then just leave it at that. For example, my target for a 2700K was 5GHz which I reached ok. From
the temps I get, I'm sure it could go higher, but I'm not going to try it since I achieved my goal.

Also remember that although it's easier to setup an initial oc with a fixed vcore, for long term
use it's a good idea to switch to offset mode so that when idle the CPU isn't being fed with the
same 1.4V or whatever. The ASUS ROG site has an article about Offset mode, how to convert
from fixed mode, etc.

Obviously though, if a chip's potential is limited by load temps, then having better cooling will
normally give one more headroom to work with.

Ian.
Edited by mapesdhs - 6/5/13 at 4:56pm
    
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post #302 of 397
Hm sad-smiley-002.gif

LinX (AVX I think) with 14,5 Gb worked for 3 hrs (31 passes).

Prime95 (AVX) Blend (FFT 8 - 4096K, SUM(INPUTS) error checking & Round off checking, 14500 Mb, each FFT for 60 mins) after 2,5 hrs - error on one core (not sure but I guess it was on 128K). Why? cryingsmiley.gif

3930K(C2), 4.8 GHz: 1.4V, VTT-1.1, VSA-1.15, PLL-1.82, HT off) (measured by a voltmeter!). Corsair CMD16GX3M4A2400C9 (2400 MHz, 9-11-11-31-1T)

And what to do? + Vcore/VTT/VSA on one notch? After that I've had an error on one core after 5 min mad.gif
Edited by booya - 6/5/13 at 6:16am
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post #303 of 397
I had the following, but note some of my settings were designed to cope
with the presence of maxed out 64GB RAM:
Code:
CPU Core Voltage:      1.216  (Offset Mode, Offset = +0.035)
CPU VCCSA Voltage:     1.141  (Manual Mode; my setting:is 1.12)
DRAM Voltage (A/B):    1.668  (my setting: 1.655)
CPU PLL Voltage:       1.835  (my setting: 1.825)
VTTCPU Voltage:        1.277  (my setting: 1.25)
PCH 1.1V Voltage:      1.107  (my setting: Auto)
PCH 1.5V Voltage:      1.510  (my setting: Auto)
VTTDDR Voltage (A/B):  Auto
VTTDDR Voltage (C/D):  Auto

All DRAM CTRL/DATA REF voltages on Auto.

One thing I didn't do though was try to run the RAM at the max rated 2400
speed, I figured that might be expecting too much, but it runs A-ok at
2133 instead @ 10/13/13/33/2T (didn't have time to optimise the settings).

What are your DIGI+ Power Control settings? I used:
Code:
CPU LLC: High
CPU Current Capability: 130%
CPU Vcore Boot Up Voltage: 1.370
VCCSA LLC: High
VCCSA Current Capability: 130%
CPU Spread Spectrum: Disabled
CPU Power Duty Cycle: T.Probe
CPU Power Phase Control: Optimized
DRAM-AB Current Capability: 130%
DRAM-AB Power Phase Control: Optimised
DRAM-CD Current Capability: 130%
DRAM-CD Power Phase Control: Optimised

All other settings are on Auto.

All power saving features are on Auto, with SpeedStep enabled.

Hope this helps!

Ian.

PS. It's possible this was just a particularly good chip sample re coping
with the max RAM, etc.; who knows.
    
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post #304 of 397
I've got all settings on Extreme and almost without any limit. I wonder why in LinX with AVX, with higher load and temps I don't have any problem, but in P95, with lower temps and load, I can see an error on one core. That strange.

VSA, VTT, VCORE and DRAM voltages are measured by a voltmeter under load and at idle.

Maybe P95 with all free memory makes some kind of load, that looks not so heavy like LinX and MB set VCORE voltage a little lower than under LinX (LLC - High) and it's not enough? I also noticed that mem. modules getting hotter than under LinX (with all free memory usage).

It's not a P95's bug or something? I run P95 like this:



Except the number of cores (screen was taken on a another computer).
Edited by booya - 6/5/13 at 6:04pm
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post #305 of 397
Im back on my new System. Now with 1050W Power supply and 32GB RAM at 2133Mhz.

My CPU is now cooler than before and ist not throttling down to 3,6 - 3,7 with Prime. Thanks to the Double line method.

I know i said 3 or 4 times. But thanks mapesdhs for all your Information and your suggestions you gave me.
post #306 of 397
lol didnt know that i have an second account with my old nickname here ^^
post #307 of 397
booya writes:
> I've got all settings on Extreme ...

I'm not sure using Extreme so much is the best approach. Remember the tradeoffs involved if one
does this, especially the LLC settings.

What re you using for CPU Power Duty Cycle and CPU Power Phase Control?


> It's not a P95's bug or something? ...

Could be I suppose. Mind you, since we're not using ECC RAM, an unpreventable memory error could
occur anyway just from general randomness.


> I run P95 like this:

Hmm, I've never forced P95 to use so much RAM. I just run it first with 1344/1792 FFTs to identify initial
instability (an oc can survive an hour on normal Blend, but fail in seconds using custom 1344 or 1792),
and if it can pass those then I'll test it on normal Blend for an hour. I don't bother running it for hours &
hours though, waste of time IMO. As Miahallen says, aside from typical tests like P95, really the final
stability test is whatever application one intends to use, whether that's gaming or something else.
Reading an old review this week of a GTX 580, the author commented that their oc'd 580 sample would
happily F@H for 12 hours and run all manner of games just fine, but was unable to run 3DMark Vantage.

That's the problem with stress testing programs, it's possible to be too fussy with them. In my case the
real test was AE stability, which turned out to be far more demanding than P95. In the event I didn't have
time to tweak voltages, etc. to make it 100% ok at 4.8, so the easier solution was just to drop it one
notch to 4.7. For my own system I hope to do better though.

Just being sidetracked atm by a GTX 580 funfest. biggrin.gif Obtained 4 of them, already bagged the quickest
Firestrike Extreme result for SandyBridge + multiple 580s (just 3 atm; not run all 4 cards yet, wrong mbd),
4th out of all results returned:

http://www.3dmark.com/fs/518524

When I move them into the 3930K case, maybe I can grab the #1 spot. biggrin.gif Anyway, I'll get back to the
3930K setup next week.

Ian.
    
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post #308 of 397
Quote:
Originally Posted by Myramond View Post

Im back on my new System. Now with 1050W Power supply and 32GB RAM at 2133Mhz.

My CPU is now cooler than before and ist not throttling down to 3,6 - 3,7 with Prime. Thanks to the Double line method.

I know i said 3 or 4 times. But thanks mapesdhs for all your Information and your suggestions you gave me.

Most welcome!! Glad to hear you were able to get it working ok! 8-)


Well, summer is starting to annoy me again. 26C ambient room temp is a total pain re oc'ing...

Oh, I've added the GTX 580 to my Viewperf summary tables. As expected, it's awful. Even a Quadro 600
is much better. 580 is great for CUDA, great for games, but if you're doing pro stuff, then (with the sole
exception of Ensight) get a Quadro. See: http://www.sgidepot.co.uk/misc/viewperf.txt

If any of you are using AE, the CS6 11.1 "Teddy Gage" benchmark completes as follows:

5GHz 2700K in software: 76 minutes
1x GTX 580 797MHz: 5m 36s
2x GTX 580 797MHz: 3m 34s

Not yet tested with 3 & 4 cards, that's for next week, after I get the 3930K sorted out.

Ian.
    
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post #309 of 397
mapesdhs
>I'm not sure using Extreme so much is the best approach. Remember the tradeoffs involved if one
does this, especially the LLC settings.

It's only bad for motherboard, but I've got a water block on it . For MB and CPU, high LLC it's 100% the same as low LLC and + vcore. For ASUS RIVE it's the best setting, because in this case will be the smallest voltage deviation at any load.

>What re you using for CPU Power Duty Cycle and CPU Power Phase Control?
Like this (with a few changes now):





>Could be I suppose. Mind you, since we're not using ECC RAM, an unpreventable memory error could
occur anyway just from general randomness.

It's not a bug rolleyes.gif. It's just an unstable overclock smile.gif And Linpack can't catch it.

Now I'm using Strap/BCLK at 125 MHz. So totally it looks like 128.62x37, VCORE 1.404V, VSA - 1.166V, VTT 1.109. All voltages was measured by a voltmeter under Linpack and Prime95. So it's my max volts.

2 hrs under P95 with FFT 448K. Now more than 4 hrs under P95 with FFT size 8 - 4096K with all free MEM (I think it's important). I guess if after 12-15 hrs I ain't see any error, I will stop the test and will use PC like it should be.

I think the problem with Linpack was in insufficient VTT/VSA voltage. Why LinX was unable to catch an error I don't know, but it's was not LLC fault.
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post #310 of 397
Ok ist not running on 4,2. The same Problem as before. I thougt it would run on 4,2 but this was only because prime stopped automatically after fatal error. That was because i forgot to set my ram to xmp. id only set them to 2133mhz which caused the error in prime and also let starcraft 2 Crash several times.

So im happy to have my PC back and an working Mainboard and CPU now. But i dont understand why the 3970x gets so hot. I think i fail at attaching the thermal compound. Im taking too much of it every time. I mean the compound should not be all over the CPU?

But if have to get some new. the one from noctua is empty now. Which thermal compound would you recommend. The Arctic Silver 5 or another one.
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