When I installed my card I didn't have to disable the onboard or assign irq in BIOS. Just put my card in and it worked. Geforce2 MX400. HOWEVER, can't ge this board to accept two sticks of the Fry's packaged RAM (DDR2 533.) It just gets unstable and errors out or won't boot. I've heard this...
Well, like some others here I don't expect the world in OC'ing with this board. Just a little extra. Built plenty of boxes with ECS boards and been very happy despite their reputation.
I'll try and put in some time and let others know what works.
I too got this board and a 6300 at Fry's, and am looking to overclock. I have it at 270 right now. It would not boot at 300. Had to reset the CMOS pin. Not sure where to go from here (and don't say "another motherboard" :)
Would be interested in knowing what settings others are using for...