Cold Crashes

I built a video editing workstation last year and have had ongoing problems with the system crashing when cold Interestingly if it warms up 10 to 15 minutes or has ambient room temp 80F or more, it runs very solidly. I am running the FSB@400, OC'ing the Intel QX9770 to 3.8 GHz and have swapped out the power supply and memory with no change. MemTest 86 v 2.11 runs forever with no errors and Prime P95v258 runs without errors until I have to shut it down due to inadequate cooling temp rises above 52F. That leaves the Mother Board, CPU and Graphics Card as next most logical suspects. Any ideas?

CURRENT CONFIGURATION:
1 - Asus P5E3 Premium X48
1 - Intel QX9770 Quad-Core Extreme 3.2GHz Processor
1 - Noctua NH-U12F High Performance CPU Cooler
2 - Noctua NF-S12 120mm quiet fans
1 - Corsair Dominator TWIN3X4G-1800C8DFG (4GB DDR3-1800)
1 - Areca ARC-1220 PCIe-SATA controller w/256MB
1 - Areca ARC-1000 LCD Control Panel
2 - WD 150GB Raptor drives in RAID 0
5 - Segate 250GB Barracuda drives in RAID 6
1 - Ultra Internal 3.5" Floppy Drive w/ USB 2.0 Multi-Card Reader
1 - XFX Nvidia GeForce 8800 GTS-512 (G92)
1 - Adaptec 2906 PCIe SCSI Controller
1 - 6 Ft. Shielded SCSI1 DB25M to C50M Cable
1 - 3-pin Y-Adapter
1 - Kingwin Mach 1 ABT-1220MA 1S Power Supply
1 - Zalman Z-Machine GT-1000 case - Titanium
3 - Cold Cathode Case Lights


ORIGINAL BUILD:
1 - Corsair Dominator TWIN3X2048-1800C7DFIN (2GB DDR3-1800)
1 - OCZ Silencer 750W Quad PSU - Black