For testing the MSI R7850 Power Edition, the below testbed was used:
Note: Since I’m using the latest Catalyst 12.4 drivers, performance on the same GPU with previous drivers maybe a little lower.
Below are the details of how each benchmark was conducted with specific details of settings used. All of the below benchmarks were run at a resolution of 1920×1080.
As I mentioned earlier, the Twin Frozr IV heatsink, coupled with the improved PWM should give a significant overclock on the R7850 Power Edition. Indeed I was able to take the card to its limits in Afterburner as well as AMD Overdrive within Catalyst drivers.
Stock AMD HD 7850 is running at speeds of 860MHz on Core clock and 1200MHz (4800MHz effective) Memory speeds. The MSI R7850 Power Edition comes with a factory overclock of 950MHz on the Core clock, a 10.5% speed bump.
I managed to push the MSI R7850 Power Edition to 1050MHz on the core clock and 1450MHz (5800MHz effective) memory speeds. A speed bump of 22% on core clock and 21% on memory speeds compared to reference AMD speeds. All of this without any voltage increase!
The best part, however, was that temperature and fan speeds (and thus noise levels) remained the same during overclock as when the R7850 Power Edition was running on default speeds. The fan is barely loud enough to be heard, with RPM increasing from 1,003RPM during idle to 1,150RPM under full load. Temperatures remained 28°C during idle, going up to just 54°C under full load. With the overclock the maximum recorded temperature was 56°C!