My results at this moment

CPU Freq.: 4020 Mhz
QPI: 3812Mhz
Multi: 18x
LOAD vcore: 1.288v (CPU-z)
CPU VTT: 1.90v
QPI/DRAM: 1.35v
Hyperthreading: OFF
LOAD core temps: 57 / 58 / 60 / 55
Cooling: Water



On the short term I will try to get 210 x 20 stable. Then I will make a choice between 212 x 19 or 210 x 20 OC. The advantage of 212 bclk is that my RAM runs at 1700Mhz (8-8-8-24-1T) but on the other side with 210 bclk my CPU runs faster and RAM could get tighter timings. What would you suggest?

Will also try to get a 4Ghz setting stable with HT enabled. Tried that today for a bit but seems it needs a lot more vcore then (like 1.42v under load in CPU-z). Should I try to increase QPI/DRAM voltage when enabling HT?