I reset bios to default and it starts normally. It appears I'll have to reinstall the mobo drivers though which hopefully won't cause the same problem again.
My apologies for this post being in the wrong forum.
Hello,
Just completed a build for a family member using a Raidmax case, 5 80 mm fans, 1 dvd rom, 1 dvd burner, an AMD Duel-Core 4200, evga 7800 gtx 512, an ASUS A8N32-SLI Deluxe mobo (ebay purchase, used), 2 gigs of ddr, and a 150 gig sata raptor. I used a Topower 500w psu...