boot error(?)

hay guys

i have an amd 2500 xp-m and a soltek 75frn2-l running at 2.4mhz (200x12) with 512 megs of ram running in dual channel.  I've had this setup for about a year and a half now, with no major problems, until today.  For some reason, i cant get past the boot screen with any other bios configuration other than the optimized defaults: 600mhz, 100x6.

Trying to boot with any other config and my computer hangs during post, followed by a short beep every 4 seconds. is something wrong with my mobo? psu?

pleaze halp :(

My PC was hanging at the WinXP Boot screen, I had to unplug one of my harddrives, then it would start. To get the drive reading again, I plugged it back in (While PC is on) after WinXp started up and made Device Manager Scan for Hardware.

Try messing the hardware (Unplugging a drive, testing every one until you find the problem).