Why have 2 of my hard drives gone bad?

[gplracer]

I bought a hard drive in January. It was a Western Digital 120gb jb drive. It ran fine but then it failed after about a week or so. It took it back and got another one. This one made a weird click noise every once in a while starting right after it was installed. Could my hard drive be going bad and contributing to this? It is a channel well 420 watt power supply. Motherboard monitor seems to read fine. The lowest thing was 11.67 on the 12v rail. I do have the the following hooked up to it. The power supply is about three years old.

1700+ @ 11x215=2365mhz
Epox 8RDA+
5900 video card
120gb hd
160gb hd
cd writer
dvd writer
tv tuner
2 x uv lights
4 x led fans
floppy
scanner (usb power only)

 

[Sid59]

sometimes it's just plain bad luck and coincidence.

 

[0roo0roo]

check SMART. enable in bios, then use a program like speed fan to check the drives reliability. or just download some diagnostic program from the companies site. could be anything...your case run hot? u have 4 fans yes, but if ur case really blows it wouldn't help. but if its not heat, its luck of the draw. hd's die. i have a 1800@2.4ghz with 4 7200rpm hd's, 2 opticals, all pci slots filled with junk, and 5 case fans on an antec 350watt psu