I'll start with the specs:
Intel S5500BC Board
2x Intel Xeon E5506 Processors
8x Corsair CM72DD2G1113 RAM
1x Western Digital Caviar Green WD10EADS-00P8B0 HDD
(really 4x in RAID-10 but I destroyed the RAID thinking that was part of the issue)
Thermaltake ToughPower 1200W Power Supply
Running Windows Server 2008 R2, and WAMP 2.0i
The issue is that the machine will hang seemingly randomly. I first thought it was a HDD R/W issue because it happened a lot when I accessed/saved files, but it also hangs at other times, such as when I switch between program windows or even tabs within a window; but it doesn't do it every single time. Also, when it hangs, it hangs for sometimes more than a full minute.
I have run Memtest on the RAM (each individual stick and together), run checkdisk on each of the hard drives, updated all BIOS/Firmware/Drivers available, and ran BurninTest, all without a single error/warning.
One thing I should point out (something I was unaware of when I purchased parts) is that the Xeon processors throttle the RAM speed down to 800.
Any suggestions would be greatly appreciated.