What issues have you had with your rigs?

I've had some issues with CCC, causing my GPU to run at 100% load for no reason

I bought some cheap OCZ DDR3 Ram, it was quite faulty and OCZ RMA was a pain in the butt

and I rebooted my PC this morning, wouldn't boot into Win 7, so I checked it all out, reset CMOS, 2 hours later, I'm about to reinstall Win 7. I plug it all back in, and it boots up like nothing happens

What issues have you had with your rigs?

Not pluggin in the P4 *properly* on my first build -.-...lots of freaking and diagnosing for a cable that was 90 degrees rotated the wrong way.

My GTX260s were acting extremey wierdly until my PSU died.
Changes, the PSU and the cards kept being random.
Changes the cards and now things are fine.

On my first build I forgot to plugin the 4 pin PW connector. It wouldnt show anything on the screen until i rechecked everything twice.

I bought a boxed motherboard from fry's, take it home and it is not the same motherboard on the inside.

Also when I was younger I let the smoke out a few times.

A long while back I plugged in a 9800XT into an AGP slot incorrectly and fried the motherboard and card.

I killed my secondary system by pushing the processor too hard (derp, me need E2160 @ 3600MHz)

A year or so back I killed one of my 4850's by getting water all over it. I'm quite upset with the replacement Sapphire card I got as it isn't identical to the other card, and thus looks lopsided in my case.

Also when I was younger I let the smoke out a few times.GummiRaccoon

My main issue is a constant one, two actually. 1. My GPU is a silly little single slot that is terrible at cooling. 2. My CPU is ruined, it won't turbo anymore after i cooked it half to death going to 100 degrees+.JohnF111