Puzzled, Radnom Computer Lock-Outs

Alright everyone, I've got a question I'm hoping someone can help me answer. Because it's puzzled me and all of my really clsoe techie friends for about a month now.

I started putting a PC together to get ready for Vista, and everything went fine.

Firstly I bought an Ahtlon 64 X2 6000+, 2GB of Ocz RAM, A MSI K9a Platinum board, Radeon X1650 GPU all on a 600W PSU.

Now, after 28 days I started getting random lock outs on the system. Both monitors I have connected would suddenly loose all signal and go into standby, but the computer itself would never shut down. I couldn't press the pwoer button to cut the power, rather I had to use the killswitch on the back of the PSU to get it off. When I flipped the switch back on, and started the PC once more the monitors would never gain signal again and keep in the "shut off" state, even if the tower had all fans running fine, no beep codes.

If I left the PSU off for at least 1 hour and tried again, the PC would boot just fine only to seize up a good hour or two into use, and the process started all over again.

Next step I tried was reseting the CMOS, I left the battery out for 24 hours and the jumper on reset, replaced the jumper and battery and booted just fine. I could use the system for about six hours and then it started the same stuff over again.

I tried removing one stick of my memory, and then switched with the other to no avail. Even removing both sticks at once doesn't even give beep codes when the PC is locked up in this weird state. I tried removing the GPU to see if it would boot as well, and nothing.

I took everything out and reseated it all, only to have the problems continue to strike me over and over.

Finally I said screw it and bought a new motherboard, going back to Asus my company of choice. The new board is a M2R32-MVP. Firstly, for the first week or so everything went fine after I upgraded the board's BIOS to support the 6000+, then the terror struck once again.

Next, I tried replacing the PSU with a BFG 800w quad rail. At first it seemed to work fine as well, then started up once more.

Next I replaced the RAM with 2gb of Kingston, and I put in my new HD2900 XT to see if it was a GPU problem. I used the system for about 8 hours today, and it's started to do the same crap again.

In short, I have replaced everything but the CPU and my HDD/CD-ROMs.

Am I doomed to just having a bad processor, or is there something I am missing here?

Try replacing the CPU if it's still under warranty and maybe check the temperature in your computer. Maybe the computer getting too hot (or maybe just the CPU getting too hot) might be the cause of the problem. I had the same problem once but it was the PSU that got too hot and would just turn itself off. I "fixed" it by leaving one of my case's panel open.

I've tried to keep an eye on temps, but I don't think that things are running too hot. I've got good ventilation throughout the PC, just upgraded my fans and all. I do have Arctic Silver 5 on the CPU, stock cooling fan. I can try upgrading that next.

The CPU is out of warranty but I suppose I can fork out some money for another after I try seeing if it's a cooling problem.

Anyone know any good programs I can run in Vista to see the current temp read outs from the mobo?