Overclocking the Red Devil RX 470
Unfortunately, PowerColor originally shipped us a Red Devil RX 470 with its clocks locked down by its Performance BIOS to reference RX 470 boost speeds (1206MHz). The only clockspeed adjustment that we were originally able to make was to increase the memory clocks by 50MHz which did not have any positive impact on performance.
Next we tried a 2% overclock. After that, we kept the 2% overclock the same but increased the memory clocks by 50MHz to 1800MHz.Any memory overclock impacted the performance negatively, even with a higher core overclock. So we returned our memory clocks to the stock 1750MHz and increased our core speeds to 3%.
We noted that the temperatures still remained at around 80C but the fan speed automatically increased to compensate for the incremental increase in core temperatures to 1310MHz although fan speeds and temperatures varied according to ambient conditions. Next we tried 4%.
At 5%, the clock speed is 1335MHz or 65MHz over PowerColor’s clocks and 134MHz over the reference 1206MHz, and the temperature is basically unchanged from the upper 70sC to 80C. There was no throttling and the core boost speed remained consistent.
We tried 6% but the overclock was unstable and we experienced crashes to desktop. Even 5.5% was unstable for many games, so we settled on 5%, or 1335MHz boost with stock memory clocks (1750MHz). Let’s head to the performance charts to see how the PowerColor Red Devil at PowerColor Clocks (1270MHz) and further overclocked by us (1335MHz) compares with reference RX 470 speeds (1206MHz). We shall also compare it with the reference RX 480.