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 +90mV, with the GPU performance boost set to 27.
This saw our Time Spy score increase by 10%, and offered a 9% boost to frame rates in Resident Evil Village, so it's not too shabby at all for a pretty painless OC.
Of course, power draw did also increase, hitting 279.8W, further reducing the A750's overall efficiency.