Well, just a couple days ago, I was replacing my Tt2 with another, much quieter Thermaltake CPU fan, and apparently my Abit didn't like it... so it decided to beep like a banshee (well, if they beeped) as soon as I booted. Turns out it thought there was no fan, though the fan definitely is working, and --
BUGGER, I just opened the uGuru to check my proc temp and it started doing the "omgsomething'swrongbeepofdoom" again.
Anyway, the point of this was that the worst thing I've ever done to a computer was building it with an Abit board. Poor OC'ing, obtuse BIOS, weak performance next to the DFI's I prefer to use.