First time, I was trying to mount a DangerDen waterblock (piece of crap) and got mad and jammed it on there and evidently killed the CPU. You can't get to the hose clamps on that model. I use Swiftech only now, and forever. My hoses were too stiff also, now I use only latex like tubing on water block connections.
Then, while still mad I removed that water block by disconnecting the tubes at the block (wrong) and lifting the block out. Spilled water on the memory and killed the memory slots, memory was still good though. I tried everything to dry it but ended up just buying a new board, it was easier.