Quote Originally Posted by phsinc1 View Post
@blunt, what did you do to get 20x200 stable?
Spent days tweaking my BIOS!!

I also use 100ps CPU Clock Skew as well, I am pretty sure this has helped stabilize my 20x200 profile.

It was so much harder getting 20x200 stable than it was with 21x191, I didn't even need to try with the latter..

It's all about finding the right balance between each voltage I think, as I had tried using Vtt right up to 1.415v, and my Vcore up to 1.3500v when I first started trying to get 20x200 stable, and it would BSOD after a couple of passes of LinX with those voltages, so I kept playing around with them, and I finally found that by lowering Vcore to 1.2645v and Vtt to 1.215v my o/c was stable.

I also have IOH Core set to 1.140v, QPI PLL @ 1.140v, CPU PLL 1.300v, VDimm 1.66v, and the rest are left on Auto.

I much prefer using 20x200 for 4GHz o/c, as I always feel like I am cheating when I use Turbo Boost for the 21x multiplier..