Thanks for the swift replies. Non-Vsync makes games feel choppy when your eyes are extremely sensitive to the monitor(been playing games for 15 years). My GPU temps max out around 70c which is entirely fine. I have done clean installs of GPU driver many times. The PSU theory is valid but I doubt it. And yes, I have tried around 25 games, all have similar issues with the hardware not throttling up in a stressful situation.
In Bios, I have made sure the CPU isn't set on saving power, and I don't have any programs besides Heavendx11/MSI afterburner and various games/VOIP installed.
Any more theories?
Also look at the edit in my post.