Which is it - motherboard or processor or...?

Dfi Dfi infinity 975x atx intel motherbo...
August 24, 2010 at 09:56:29
Specs: Windows XP, Core 2 Duo E6600 2.4 GHz / 2x1GB DDR2800 SDRAM
Hi forum,

My homebuilt PC (975x chipset, Core 2 Duo E6600 Conroe 2.4GHz) had a lousy heatsink installation (by me) which fell off while I was moving apartments. I didn't notice this right away, tried booting several times, all with the result that the computer shut down while the BIOS was posting. I tried this a few times, until when I tried to boot it the fifth time or so, the hard drive and CD's will light up and so will the light outside the case, but I get NO DISPLAY or beeps at all (yes, I've checked the power cables and monitor).

I bought a nice new heatsink and installed it properly. The fan turns, as do all the fans, but it still won't give me a display or any beeps. I tried removing the other PCI cards, no change. removing and reinstalling the ram, no change. Booting without ram, no change. Booting with no CPU and no RAM. All the same result - fans turn, drives light up, no beeps or display.

It seems to me, though maybe I'm wrong, that I must have fried something by trying to boot repeatedly. What should I do - replace the motherboard, replace the processor, or something else? If I have to replace a part, which part should I try replacing first, and what should I replace it with to upgrade my system a little without having to change anything else or spend more than $100-$200 overall?

THANKS in advance,

Full system specs:
DFI INFINITY 975X LGA 775 Intel 975X ATX Intel Motherboard
GeForce 7950GT 512MB 256-bit GDDR3 PCI Express x16 SLI
CORSAIR XMS2 DOMINATOR 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400)
Seagate Barracuda 7200.10 ST3320620AS 320GB 7200 RPM SATA 3.0Gb/s 3.5" Hard Drive
Core 2 Duo E6600 Conroe 2.4GHz LGA 775 65W Dual-Core Processor BX80557E6600
APEVIA ICEBERG ATX-IB680W-BL 680W ATX12V / EPS12V SLI Ready Power Supply
LIAN LI PC-60BPLUSII W Black Aluminum ATX Mid Tower Computer Case

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August 24, 2010 at 12:14:10
It's virtually impossible to overheat a modern CPU to death. They all have built in thermal protection circuitry which will cause the CPU to automatically shutdown before the temp reaches the point of no return.

I doubt you needed a new HSF, you just needed to reinstall the one you had correctly. What you should have done was completely clean all traces of the old thermal compound off the top of the CPU & bottom of heatsink, then apply a thin line of paste down the center of the CPU & reinstall the heatsink. The paste should NOT be spread around.

This is WRONG: http://www.capn13.net/it/cpu_mounti...

This is CORRECT: http://www.elitekiller.com/pics/AS5...


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August 24, 2010 at 12:35:40
Thanks, it's helpful that you think nothing was fried, and I will try applying new thermal compound and cleaning the old stuff off, but the link to the instructions you sent me says that a modern CPU can be fried in under 10 seconds without proper cooling?

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