Random beeps? Wrong SPD detection?

My dad's office computer has been acting up lately. A week ago, he told me that the case speaker was making weird noises and beeping once every so often. So i checked it out, all the mobo connecters were connected right, no mistake there. All the bios settings seemed fine. So i did some extra. I flipped the ram divider to 1:1 instead of Auto, locked the CPU voltage at 1.75v (i think, im not sure now) locked the PCI/AGP at 66/33.

The specs on his com are:

Intel Pentium 4 1.7GHz Williamette core (400mhz bus speed quad pumped)
2x 256MB of PC2100 DDR SDRAM (Generic ram)
Asus P4B533 mobo (using onboard sound)
Western Digital 80GB IDE HDD
Nvidia Geforce 4 MMX440 Video Card

All of this was at stock, stock cooling too.

I booted up the comp, then it said something along the lines of partition(0) corrupted or something. Then it wont boot into windows. I checked in the bios, and in 1:1 mode, the mobo claimed that the SPD timings of the ram was 2-2-2-5, so i changed it back to Auto and checked the SPD timings again and it detected it correctly at 2.5-3-3-6, so i guess the ram corrupted the HDD whilst trying to run 100MHz (200MHz DDR) at 2-2-2-5 timings.

Im suspecting the mobo is busted due to all these problems, but i still cant be sure. Anyone wanna help me out on this?