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DirectX Error Overclocking Asus EAH6950

post #1 of 6
Thread Starter 
I've got my shaders unlocked and am trying to overclock my card but no matter how much I tweak the voltage or powertune limit it will eventually crash even though my temps don't go over 70c really. I recently cleaned the VRM heatsink and re-applied TIM to the gpu, and made sure the cooling system is securely fastened to the board. Right now it runs for a decent while, 10-15 minutes, at 920/1375 @ 1.175v and +20% powertune. Believe me, I've tried many high as well as low combinations to find this ever elusive sweet spot I need. Could there be something causing the voltage to drop enough to cause instability? Again, the temperatures are low for being under full load so heat should not be a factor.


Edited by sebzag - 8/27/13 at 8:31pm
post #2 of 6
Thread Starter 
bump
post #3 of 6
Thread Starter 
[deleted]
Edited by sebzag - 9/3/13 at 5:17pm
post #4 of 6
Thread Starter 
I'm using Sapphire Trixx Utility for the overclocking and it appears I only have to input the offset value to what I want to adjust the stock voltage to (e.g. an input of 200 mV for VDDC Offset results in the VDDC Offset in GPU-Z to go from 1.1v stock to 1.3v). But when run HWiNFO64 in the background on sensor mode, it's show a fixed voltage of 1.1v still. Although there is also another sensor in the program that is detected after running a game, named VRM Voltage, which shows minor voltage fluctuations from 0 to 0.3-ish.

Does the gpu vddc offset on this card, or this series of cards, really work as it appears to work? Does the card generally work at 1.1v and dynamically ramp up the voltage temporarily when it needs, to a voltage limit determined by VDDC Offset.
Edited by sebzag - 9/1/13 at 3:05pm
post #5 of 6
Thread Starter 
I discovered that it's always the same file initiating the crash, "amdkmdap", which appears to be some kind of legacy driver. I wonder if it's really necessary for my card to run.
post #6 of 6
It could also be that your GPU is simply on the edge of a bin and not particularly disposed to overclocking.
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