Mine is an #3837A909 HT on, Turbo on.

Stable 200x21 @ 1.3625vCPU & 1.4125vQPI

Ive done hours of gaming, LinX and OCCT so far hasn't locked up yet.
The jump from 190x21 to 200x20 was so huge, I could do 4ghz in below 1.3vCPU.

My max temp I can get is 69-71C when doing LinX, and it idles around 28-30C. This is on water.
Havent tried clocking any higher, might be possible but im worried about the temps.

Should Prime be more stressful than OCCT or LinX?