what kind of CPU cooler/heat sink is that? This may sound like a silly question but is the 4pin heatsink fan plugged into the right header on the MB? I can't really think of any reason your motherboard would trip errors from a heatsink exchange
Its a nice air cooler from Thermalright. Its working great; dropped my temps by 9 degrees. Yes it has a 4 pin connector, and its in the right location.
Are you thinking that i have metal touching something it shouldn't, and so its faulting? Any other ideas? 1 long and 2 short seems to typically involve the graphics card, but the card is working fine as far as I can tell.