Overclocking

Once I finished out regular testing I did want to see how well the XFX would overclock, especially compared to the Sapphire. To do that I broke the overclock down into three different sections, the GPU clock, the memory overclock, and lastly the two put together. The whole time I documented everything and included it below along with the FPS results from our 3DMark 11 benchmark that I use to verify that the overclock works. With the results we can see what works for actual performance and what doesn’t.

To start things off I did a baseline benchmark at the stock clock speeds. From there I started in on the GPU clock speed jumping right to 1200MHz and failing, from there 1100MHz pass so I had to work in. After trying a few I found that 1130MHz was my peak GPU overclock without running into artifacts. For the memory I went through the same thing only it took a lot more tests to get up to a point where it failed, that was 7400MHz where I had a hard black screen crash that required a manual reboot. In the end I was able to get stable results at 7300MHz on the memory.

Next I attempted to run the two overclocks together but I ended up having artifacts. Normally that would make me think the problem was the memory but this time around I had artifacts when I pushed the GPU clocks too hard. So I turned the GPU clock down to 1120MHz and ran again without any issues. This was 10MHz less than the Sapphire managed and more importantly for some reason the Sapphire managed to put out a full FPS higher in almost all tests when overclocking. That said the XFX still managed to jump from 81.54 up to 89.90FPS with its overclock, a nice improvement.

GPU Clock Speed Overclocking
GPU Clock Speed Pass/Fail FPS Result Notes
1015MHz Pass 81.54 Stock Clock
1200MHz Fail N/A Driver Crash
1100MHz Pass 88.16  
1150MHz Fail N/A Artifacts
1130MHz Pass 90.17  
1140MHz Fail N/A Artifacts
Memory Clock Offset Overclocking
Memory Clock Speed Pass/Fail FPS Result Notes
6000MHz Pass 81.54 Stock Clock
6500MHz Pass 82.00  
6700MHz Pass 82.06  
7000MHz Pass 82.29  
7200MHz Pass 82.12  
7400MHz Fail N/A Black screen, hard crash
7300MHz Pass 78.90  
GPU and Memory Overclocks Together
GPU Clock Speed Memory Clock Speed FPS Result Notes
1130MHz 7200MHz 90.49 Failed, Artifacts
1120MHz 7200MHz 89.80  

 

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garfi3ld's Avatar
garfi3ld replied the topic: #36898 30 Jul 2015 17:49
Today I check out the R9 390 DD Core Edition from XFX, check it out

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