Originally Posted by Hl86
So my tri-x 290x fluctuates when i hit 1200 on core. Using trixx.50% power limit, 150+ VDDC, core hits 70c vrm 77-80c ingame.
What can i do to make it stable?
Are you forcing constant voltage? Have ULPS disabled? 14.X drivers have had lots of stability issues, 13.X usually better.
1200/1500 is a solid overclock for one of these cards.
More voltage or less clocks.
Best methodology for overclocking is usually one component at a time.
Start pushing GPU for example, when you lose stability drop clocks back down to the last stable clocks you had found, and then work on memory. When you lose stability here, drop clocks back down to stable settings and add more voltage.
Rinse and repeat until you find the best combination of clocks, voltages, and temperatures. It's a lengthy process, so be patient!
Core clock definitely yields better performance gains, so sacrificing some RAM speed for overall stability isn't necessarily a bad thing.
I have spent probably 100 hours benching, testing, and overclocking my 290. I have come to find that 1200/1500 yields best combination of performance, voltage, and temperatures. I am able to push my card as high as 1300/1700 with +200mV. However, at 1200/1500 I am getting 96% of the performance found with my aforementioned maximum clocks/voltages. 1200/1500 is a solid overclock for one of these cards.
Edited by Roboyto - 3/5/14 at 4:45pm