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overclocking a 970

post #1 of 41
Thread Starter 
Well I recently got a 970, and am few issues i can't narrow down. I'm having minor stability issues at 4GHz (occasional blue screen), and I can't push my bus past 185 MHz without having horrible stability issues. This last was apparent on a 920 and continued after upgrading to the 970, so I don't think it is something not associated with the two CPUs. Pushing the bus up to 185 results in some math errors when folding, they happen much more frequently than blue screens. I've tried upping the CPU Vcore to 1.3 and am still having the same troubles.

The 970 is cooled by a corsair H50, modified with a second 120mm fan so it is in push pull exhaust, getting me individual core temps around 70c fully loaded.

Memory is corsair XMS DDR3-1600. GPUs are 2xGTX570 in SLI and 1xGTX260 for physX. OS is Win7 x64.

I need this setup to be rock stable. I participate in folding@home so I cannot compromise stability at all. I'd like to dial in 4Ghz before pushing higher. Any help you guys/gals can provide would be greatly appreciated.

Current BIOS settings are:

Dummy OC - disabled
Extreme cooling - disabled
CPU clock Ratio - 22
CPU Host Freq - 182
MCH Strap - Auto
CPU Uncore freq - auto
CPU clock skew - 0
Spread spectrum - dis
PCIE freq - 100
OC Recovery - disabled
Turbo - disabled

Memory settings
SPD - standard
Control Settings - enabled
Memory Freq - 2:8
Channel Interleave - 6
Bank interleave - 4
low gap - auto

Voltage control
vdroop - disabled
CPU Vcore - 1.29375
CPU Vtt - +100
CPU PLL Vcore - auto
IOH PLL Vcore - auto
QPI PLL Vcore - 1.35
DIMM Volt - 1.62
DIMM Vref - auto
IOH Vcore - 1.2
IOH/ICH I/O volt - auto
ICH Vcore - 1.2
VTT PWM - default
CPU PWM - default
CPU impedance - auto
QPI impedance - auto

CPU Feature
Speed step - disabled
Turbo - disabled
CxE - disabled
EDB - enabled
VT - enabled
HT - enabled
Active cores - all
QPI control - enabled
QPI link - enabled
QPI Freq - auto
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post #2 of 41
Thread Starter 
Currently stability testing with some slightly altered voltages.

CPU Vcore - 1.31875
CPU Vtt - +275
CPU PLL Vcore - 1.845
QPI PLL Vcore - 1.4
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post #3 of 41
Well, you're right that stability speeds due to bus wouldn't be down to the CPU, that's down to the motherboard.

Saw that your uncore clock is set to auto, that wont be helping.

Didn't see your QPI link speed listed there either, you should turn that down along with your uncore if it's still on auto.

Found it down the bottom, it is on auto, turn that down to it's lowest numerical value along with the uncore. (I would bring the uncore up a few notches off the bottom once you have a stable OC you're happy with)
    
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post #4 of 41
Can you look in you event viewer in system and security in control panel or on blue screen for error code 124 or 101. In event viewer they will be in errors and warnings under bugcheck. On bsod they'll preceed a number of other numbers but the 101 or 124 will be prominent.

There are a number of settings on that mobo I'm not familiar with but for folding that vcore looks low so I anticipate a 101 error.

Be prepared to feed that CPU more than most people- Folding requires a lot extra to get stability as you get to 4g.
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post #5 of 41
Thread Starter 
I don't see any errors with those codes, but then I don't see the errors, only Kernel-Power saying that the system recovered from improper shutdown.

I'm fine with "feeding" it, as long as I can keep it stable, it's only drawing 825W from the wall, that's plenty to spare on the 1000W P/S.

lowering QPI link and Uncore will be my next direction, thanks for the advice
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post #6 of 41
Thread Starter 
The new voltage adjustments made things worse not better. No blue screens, but I Early Work Unit Ended several work units. Far less stable, as I was able to finish some work units previous to adjustments.

I lowered QPI Freq to 4.8 (the lowest setting), and reduced the voltages somewhat.

Current BIOS settings are:

Dummy OC - disabled
Extreme cooling - disabled
CPU clock Ratio - 22
CPU Host Freq - 182
MCH Strap - Auto
CPU Uncore freq - auto
CPU clock skew - 0
Spread spectrum - dis
PCIE freq - 100
OC Recovery - disabled
Turbo - disabled

Memory settings
SPD - standard
Control Settings - enabled
Memory Freq - 2:8
Channel Interleave - 6
Bank interleave - 4
low gap - auto

Voltage control
vdroop - disabled
CPU Vcore - 1.29375
CPU Vtt - +200
CPU PLL Vcore - auto
IOH PLL Vcore - auto
QPI PLL Vcore - 1.35
DIMM Volt - 1.62
DIMM Vref - auto
IOH Vcore - 1.25
IOH/ICH I/O volt - auto
ICH Vcore - 1.25
VTT PWM - default
CPU PWM - default
CPU impedance - auto
QPI impedance - auto

CPU Feature
Speed step - disabled
Turbo - disabled
CxE - disabled
EDB - enabled
VT - enabled
HT - enabled
Active cores - all
QPI control - enabled
QPI link - enabled
QPI Freq - 4.8
Omega
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Omega
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post #7 of 41
Have you tried 200*20 @ 1.38vcore and working your way down?

Bit-tech had an article on stabilizing an i7-970 (during a comparo with it's big brother, the 980x)

Here's the article.

This is relevant to my interests as I have a 970 on the way.
post #8 of 41
Thread Starter 
something holds me back at 185. So until I get things sorted out 20x200 is out of the question. I'm trying those voltages at 22x182 right now, can't hurt, as every thing else has not worked. Making things really warm tho, I have cores pushing 80C right now.
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post #9 of 41
Bring you CPU PLL to 1.6, that really helped me with my 980x(CPU PLL @~1.59v)
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post #10 of 41
That's the cooling power of a H50 for you.... it may be beneficial to invest in a more capable cooling solution.


But aside from that, if you're getting FSB issues, why not increase your multiplier, I'm sure you can go up to 24x on a 970
    
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