Good amd dual core socket 939 motherboard?

[Zero1]

Don't discount the possibility of overheating. I tend to get IRQ errors when overclocking. Check your temps before doing anything otherwise if it is overheating you will get the same problems whatever motherboard you use.

Edit: I just checked the case and I wouldn't be at all surprised if it was overheating due to it's size, but obviously I can't comment on how well ventilated it is.