For our manual overclocking tests, we used Intel's Arc Control software. Our best results are as below.
Overclocking with Arc Control was surprisingly painless. We increased the power limit to its maximum value of 228W and set the GPU voltage offset to +55mV, with the GPU performance boost set to 16.
This overclock resulted in a 10% boost to the Time Spy GPU score. Resident Evil Village didn't scale as well, but we still observed a 7% increase in the average frame rate, which is better than nothing.
Power draw did increase while overclocked, averaging just over 280W, further reducing the A770's performance per Watt.