I recently upgraded my GPU, from a 5700XT to a 6900XT.
Undoubtedly, there has been a significant increase in performance, but using the GPU-Z program I noticed that the GPU clock frequency continues to vary, passing from 50Mhz to 1500Mhz and then going to 350Mhz, then 1800Mhz etc.
I tried to overclock “forcing” the GPU to work from 2400 to 2500Mhz but it doesn’t even get to 2000Mhz, as if there was no overclock.
I tried with DCS to see if I had the same problem and instead it was more constant and above all it worked a little above 2400Mhz.
My PC is composed of i7 9700K @ 5Ghz
32GB RAM 3200Mhz
Asrock RX6900XT Phantom Gaming
Corsair RM 1000X PSU
Oculus Rift S HMD