My computer is less than a year, and I bought a 6650XT 3 months ago. I'm new to overclocking, so I don't know much. I am having several issues with overclocking my GPU.
The default setting for my memory clock is 2188 MHz, and when I try to raise it up by a little bit such as 2190 MHz, my monitor begins to flicker. Another problem I face is when I'm monitoring my GPU in GPU-Z, I can see that my core clock fluctuates up and down like from 330 to 2757. Also note that my temperatures are below 60C and never goes above, so I don't think it's a temperature issue. Right now my settings are set to: