Guys, need some advice here. I thing I got a "not so good" 920 C0/C1.

My max stable OC is this:

C1E: OFF
HT Tech: ON
CPU cores: ALL

HT: Off
Intel Speedstep Tech: OFF
Multi: 21x
Bclk: 200
QPI-Links: Full
Uncore: 3200
QPI: 3600
DRAM Speed: 1600 @ 9-8-8-22 1.60v

Vcore: +0.180 (1.456v @ CPUz)
VTT: 1.56v (1.504v after drop according to bios)
PLL: 1.80
VNB: 1.150v
SB: 1.50v
QPI/PCIE PLL: 1.190v

I this VTT ok for 24/7? With less then this system crashes on Linx. For 4GHz (20x200), I need the same settings, just with a little less vcore.

For 19x210 I also need a lot of VTT. I know it's not a D0, but is it safe using this on an air cooler?