To overclock the AMD Radeon HD 7750 video card we used AMD Overdrive to find the highest stable overclock without any voltage increases.
The AMD Radeon HD 7750 reference card comes clocked at 800MHz on the core and 1125MHz on the memory. If you use CATALYST Control Center (CCC) like we did, you can raise or lower the clock frequencies within the parameters set by AMD. For this card AMD set limits for this particular BIOS to 900MHz on the core and 1250MHz on the memory. We were able to run the card at 900MHz on the core and 1250MHz on the memory without any stability issues.
Here is a GPU-Z screenshot showing the overclock! This is a 100MHz overclock on the core and 125MHz on the 1GB of GDDR5 memory.
Radeon HD 7750 at 800MHz core and 1125MHz memory:
Radeon HD 7750 at 900MHz core and 1250MHz memory:
We tried out this overclock with Futuremark 3DMark 11 on the performance preset and saw the score go from P2736 to P2897, which is a 5.9% or 161 3DMark point increase from the card’s stock settings. This isn’t a huge performance gain, but it is better than nothing.
In real games like Metro 2033 we went from 12.00 FPS to 12.67 FPS at 1920×1080 and 17.00 FPS to 18.00 FPS at 1280×1024. This is again a ~6% performance improvement, which is better than nothing. If you wanted to increase the voltages you could likely get a better overclock.