DFI UT X58-T3EH8 continued - Part 2

[Dami3n]

Now that i have more time, im trying to get 4ghzs from my 920, but without success
It´s strange. No problem with 3,8 HT ON at 1,248v(1,26v in bios), but when i tried 200x20 or 211x19, even without HT, prime freezes in a 10-15seg. No matter what i try. I can reach windows with the same config for 3,8(1,26 vcore/1,24vtt), but even with 1,37v vcore/vtt, prime always freezes at the same time.
Any idea/advice/tip?