Thanks for replying! I had been bringing the RAM multiplier down a tick or two, and even tried it at 4x, the smallest multi allowed, and I would still get either errors during POST or freezing/loss of video signal/other forms of instability during Win7 boot.
I also tried setting the FSB to 251MHz and it wouldn't cooperate, yet it is utterly rock solid at 250. Makes me wonder if there's something in the BIOS itself that won't let me OC beyond 3.5GHz. I'd call Gigabyte but that'd be about as helpful as posting this question on a dating advice forum. Anyhow, here are my specs:
AMD Phenom II X6 1055T (OC'd to 3.5GHz)
8GB (2 x 4GB) G-Skill Ripjaws PC3-10700
Gigabyte GA-880GM-UD2H Rev 1.4, Award BIOS version F8
ATi Radeon HD 5770
Antec Kuhler H2O 620, push/pull fan config on radiator
Antec 900 with 4 120mm intake case fans, 1 top-mounted 200mm Antec BigBoy exhaust fan, and 2 exhaust fans in push/pull config on radiator
1 Seagate Barracuda Green 2TB SATA 6Gb/s, 1 Western Digital MyBook 500GB USB 2.0, 1 Western Digital MyBook 1.5TB USB 2.0, 1 Hitachi XL2000 2TB USB 2.0
1 Asus SATA 3Gb/s DVD-RW
Here are my CPU-Z tabs as requested:
Sorry for the long post, just trying to give you as much info as possible. Let me know if you need anything else. Thanks again!