Ok heres my problem, I have run Hmonitor, speedfan and a couple of other programs that test voltage for the +3v, +5v and +12v. All are good exept one. The +12v is reading on every test an average of +4.33v-4.88v.
So far I have replaced the psu, reformated the harddrive, replaced the harddrive, connected and unconnected the wiring, replaced all the cables and sata cords, all fans are running well and even unplugged them. Unplugged all the cdrom drives and usb connections to the motherboard.

I have run the following tests, ram test, harddrive tester, complete virus SCANS, REGISTRY cleaners. Nothing has come up. I also have a premade store bought computer from hp and hence the voltages inside the bios cannot be modified.

It wouldnt necessarily be a problem as the computer doesn't lock up but hickups from time to time being a amd dual core chip. However when I play any game now, my processor usage always runs near 100PERCENT, and it never used to before.

Only thing I can think of is even though its a rare problem, maybe one of the connection pins inside the motherboard is bad. I am going to run a multimeter on some of the plugs tonight.

The only other thing I can mention is yesterday just checking around the specs, my processor was reading at 900mhz when its supposed to be at 2200mhz. After a minute it went back to normal but that seemed strange to me. I cannot overclock or underclock my cpu as the bios is the phoenix ones where you cant modify them. Any kind of info would be greatly appreciated. Remember to keep in mind I have replaced everything except the cpu and the motherboard itself. Everything else has been replaced or taken out.

Motherboard Name: MS-7184
HP/Compaq motherboard name: AmethystM-GL6E
Athlon 64 X2 (T) 4200+ 2.2 GHz
2000 MT/s Socket 939
3gigs Ram
8600 gt 512mb
There is clearly a problem with the voltage sensor - your drives and fans won't work at 4 - 5 volts.

EDIT: Post back with your multimeter readings.