I am not familiar with that board, but would reseat the heatsink if I were you. Make sure it is not cocked or uneven and that it makes good contact with the core (no gap) and has proper thermal grease applied.
VapoChill/XP Pro OS
AbitKR7A /2x256 2.2.2. Mushkin PC2100/DDRHP
Plextor16xCDRW / PioneerDVD
100GB WesternDigital SpecialEdition7200HDD
Turtle Beach Sound
Channel Well 420PSU