Here's where I'm at with my E8500, prime and orthos stable for ~2hrs,

Crysis and MS FS9 rock solid:

Bios 0704

Multi: 9
FSB-MEM: Linked & Synced
FSB: 1801
MEM: 1801

Memory timing:
P1: Enabled
P2: Enabled
8-7-6-15 2T
All subtimings Auto

Overvoltage settings:
CPU: 1.300
Loadline Calibration: Enabled
PLL: 1.5
VTT: 1.28
MEM: 1.76
NB: 1.40
SB: 1.55
GTL_REF0: Default
GTL_REF1: Auto
GTL_REF2: Default
GTL_REF3: Auto
NB GTL_REF: +20
DDR3 REF volts all Auto

My board really likes linked and synced (1:2) for some reason.

Start playing with my QX9650 soon