Gigabyte GA-965P-DQ6 Just STOPPED Overclocking?

[TheBeagle]

Although I've built dozens of PCs of all types, I've never have seen this situation before. A few weeks ago I built a new (all parts) PC for a friend using a GA-965P-DQ6 board, with the F9 BIOS, 4 GB of Crucial Ballistic P6400 RAM, and a E6600 processor. It work just swell by setting the FBS to 9 x 334, for a stable 3.0 GHz, and it ran like a charm. Unfortunately, my friend tried to install Vista Ultimate on top of WinXP Pro and messed it all up. So we had to reformat the system drives (2 x 74 GB Raptor, RAID 1) and reinstall the OS (WinXP-SP2). However, now the damn thing won't accept and keep the same OC settings (9 x 334) and bombs out on the reboot. Has anyone ever encountered this situation before. My friend did tell me that he ran the memory test as part of his attempt to install Vista, and it ran just fine. I don't think that test would have screwed up the memory timings, but no matter what I set the BIOS settings at, the thing now will only run at stock speed (9 x 266 = 2.4 GHz). I'd appreciate any thoughts that someone may have for a solution to this mystery. TheBeagle

 

[TheBeagle]

One other thing that I forgot to mention was that the video card, an ATI Radeon X1650 Pro (512 MB) also crapped out and we had to replace it. I'm wondering if the replacement card (same type) has slightly different memory speeds or tolerances for a faster FSB, and that's why it won't hold the overclock. If anyone has some good specs for STABLE overclock settings for the F9 BIOS, I'd appreciate hearing about it. Thanks. TheBeagle