Loosen TRFC to 100 and set back to back to 8 or higher
I had to keep QPI at 1.35 too for stability with the Gene II with 200 Bclock and 1600Mhz ram (see the review in my sig)
Your problem could also be LinX, I really dont like the IBT programs as they heat up ya CPU and stresses ya hardware beyond any program that I know. And I can still let my Linx stable rig crash with Hyperpi and even prime sometimes...
I usually take Hyperpi 32mb with 8 threads a ram tester. And Prime Custom 20K FFT (8 threads) for CPU vcore... I7 rig hasn't budged on me once, and it folded for days without any hickups... stable enough to me