Are you getting any BSOD? Are you running With or Without VDroop (1st voltage setting in your bios). The QPI/DRAM voltage Soul mentioned is called CPU VTT on the EVGA mobo.
My i7 920 is running Without VDroop (you'll get lower temps, I only use With VDroop at higher speeds, aka 4.6GHz and up, and with extreme cooling aka Phase).
My vcore is at 1.30625v and my cpu vtt is at +250mv. Don't go over +400mv, below +350mv is best. Increasing the cpu vtt increases your VReg temp. Keep this below 70dC under load. If it get's to 80dC your system will shutdown. I have a Koolance waterblock for the E758 VReg/Mosfet if your interested. I'll sell it cheap
Raise your VCore
BSOD 101 "Clock Interrupt not received from Secondary Processor"
LinX errors happen within 1 min of LinX
LinX produces BSOD within the first minute
Raise your CPU VTT
BSOD 124 "general hardware failure"
LinX errors happen only after 10 min or more
LinX hangs but does not BSOD
LinX reboots without BSOD
