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Hello,
I've been interested to see what overclocking might do for GPU rendering performance, but I needed to upgrade my case and power supply before I did that. Now that I have good cable management and much better cooling, I figured it was time to give it a try.
With my EVGA 580 Classified and 580 running stock at 855/1710 and 772/1544 respectively (all numbers are Core Clock/Shader Clock in MHz), I used the EVA Precision tool to slowly overclock the GPUs one at a time using 10MHz intervals. I used the RT benchmark file in between each adjustment to see what the differences were. Eventually display stabiliy started to deteriorate and I backed off to a stable number. While rendering, GPU temps stayed acceptable at 70-80°C
After overclocking, the numbers I ended up with were 955/1910 and 855/1710. Rendering time for the benchmark file fell from 1:29 to 1:23, a fair increase in speed, about 15%. I haven't tried upping the memory clock yet, but I will try that later today. I guess voltages are another issue, but I haven't tried that yet either.
So, does anyone have any similar experiences they can comment on? Is anyone using overclocked GPUs as a regular thing with RT/GPU? Have there been any problems?
Thanks very much for your comments,
-Alan
I've been interested to see what overclocking might do for GPU rendering performance, but I needed to upgrade my case and power supply before I did that. Now that I have good cable management and much better cooling, I figured it was time to give it a try.
With my EVGA 580 Classified and 580 running stock at 855/1710 and 772/1544 respectively (all numbers are Core Clock/Shader Clock in MHz), I used the EVA Precision tool to slowly overclock the GPUs one at a time using 10MHz intervals. I used the RT benchmark file in between each adjustment to see what the differences were. Eventually display stabiliy started to deteriorate and I backed off to a stable number. While rendering, GPU temps stayed acceptable at 70-80°C
After overclocking, the numbers I ended up with were 955/1910 and 855/1710. Rendering time for the benchmark file fell from 1:29 to 1:23, a fair increase in speed, about 15%. I haven't tried upping the memory clock yet, but I will try that later today. I guess voltages are another issue, but I haven't tried that yet either.
So, does anyone have any similar experiences they can comment on? Is anyone using overclocked GPUs as a regular thing with RT/GPU? Have there been any problems?
Thanks very much for your comments,
-Alan
