I have a reference cooled Sapphire Vega 64 card. GPU-Z says that the stock GPU clock is 1630mhz:
However, regardless of what mode I run it in, the card does not manage to hit those clocks and actually fluctuates quite wildly. Benchmarks from Heaven and data recorded in GPU-Z logging:
This is stock everything and set to "turbo mode" in AMD Settings:
This is in "custom mode" with no fan limit and 50% power limit increase:
It seems that with the increased power limit, the card can sustain higher clocks, but again, it's still not hitting the 1630mhz as reported.
Does anyone know why this may be? My old Fury would hit it's overclocked figure and just be pinned to that clock speed so long as it was in 3D mode. This Vega 64 seems to have dynamic clocks!
I tried increasing the voltage for the highest GPU state (which is the 1630mhz clock), but it won't go above the stock 1200mV (keeps resetting itself when I type in a higher value).