Possible PSU fault

Earlier this morning one of my hard drives clicked off and my system stalled. So I restarted and it happened again. So I disconnected it from my machine and now it seems to be running fine. The only reason why i say this could be a possible PSU fault is because my PSU unit seems to be making a clicking sound and ive had another one fault on me before.

System Specs:
Voltage
12v - 13.2
5v - 4.85
3.3v - 3.28

Antec 300w
1800xp
win2k
asus a7v266-e
1024 DDR
Lite on DVD
Lite on Burner
Two ibm 40 gigs.

Welcome to the forums

I see you are running IBM drives. First thing to do is go here;
http://www.hgst.com/hdd/support/download.htm and DL the diagnostics for the drive and test it. Some IBms are notorious for problems, so the PSU might not be your trouble at all.