Im currently getting this really load clampy cutting noise from the Hard Drive. Its not the wires, its not the HD (replaced 2ce from NCIX, same thing) so i think its the PSU. With my old 160GB HD there was no clampy noise. This is a 500GB.
Dual Core 3800+ 2GHz EAX1800XL 256MB Video Card 500GB Hard Drive 3GB Ram 430W PSU
More aboutwatts needed loud clampy noise
A good quality 300W PSU could easily run that.
+1^ But u shuld nt even rule out a bad HDD... try to add the HDD to another computer and check it...If u get the same noise, mayb u shuld get it replaced...
Sometimes it's hard to easily identify the source of a noise inside a pc case. Have you tried disconnecting the hard drive and starting the computer to see what happens?