Cpu voltage 1.475 without vdroop, VTT 1.324, PLL 1.918, PCH 1.120, V dram 1.671v but i have some poor memory..and don't forget tu use lower QPI link value(you have two values, for example at BCLK 200 you have 6.400GT and 7.200GT). And don't boot from bios at 228 BCLK directly, use 220 and raise it with OC TUNER.