Here we present the average clock speed for each graphics card while running the 3DMark Time Spy stress test for 30 minutes. We use GPU-Z to record the GPU core frequency during the Time Spy runs. We calculate the average core frequency during the 30 minute run to present here.
Click to enlarge.
Looking at the card's average clock speed under load, here we test both the Performance and Quiet BIOS. There isn't much of a difference at all, with the P BIOS averaging 1898MHz compared to 1875MHz for the Q BIOS. As far as I can tell, the only actual difference between the two BIOS is the fan curve, as both have the same 340W power target (more on that later) and rated 1785MHz boost clock. That means the small difference in actual clock speed is due to GPU Boost slightly dropping clocks for the Q BIOS, as it does run a little warmer. This is expected behaviour.