Prime95 'ing the rig and getting lock ups and reboots after about 10 mins of Torture testing....

Hardware
UD5
Intel Core i7 920 D0 Stepping (SLBEJ) 2.66Ghz (Socket LGA1366)
OCZ Gold 6GB (3x2GB) DDR3 PC3-12800C8 (1600MHz) Tri-Channel
- 1600MHz DDR3
- CL 8-8-8-24 (CAS-TRCD-TRP-TRAS)
- 1.65 Volts
Water Cooled on a Quad Rad (temps don't go above 60)

CPU Clock: 20 x
Uncore: x 16 (3200) (tried 3400)
BLCK: 200
RAM:
8
8
8
24
1

Load Line: Enabled
CPU VCore: 1.3V
QPI/Vtt: 1.335V (also tried AUTO)
Dram Volt: 1.64V

Any suggestions please?