ARGH!!! MSI K7T Turbo2 Troubles

I got problems.

A machine I built for the office is going haywire. Keeps rebooting randomly. Check the temps, 23-27c for the case, 44-53c for the cpu. Voltage is all in spec, checked it with a multimeter.

1600+
K7T Turbo2
512mb Pc133, CAS 3
80gb Maxtor hd, 7200 rpm 8mb cashe
Geforce2 GTs 64mb
Antec 300w psu
Realtek Nic
Cdrom, CD-r, floppy 'n such

All the components were there before running nicly in an older system. I just added motherboard, cpu and psu/case. Im leaning towards the mobo being bad, but Im not getting anybad led's on the mobo header.

Im hoping I am just missing something here. Ive looked and looked, tried pulling things and adding things, different heatsinks and everything.

--
"To be prepared for war is one of the most effectual means of preserving peace."
"There is nothing so likely to produce peace as to be well prepared to meet the enemy."
-George Washington