Last night I installed an Asrock 939dual board in a new case. In the manual it says not to use 3.3v agp cards because it can damage the motherboard. So I look up my agp card (geforce4 440mx) and find it's a x8, so has to be 1.5v right? So I think everything's ok. When I install this board and switch on, I get a slight crackling noise and a small puff of smoke from the agp card. OK, I know that card is finished, but do you think I've damaged the mobo? It was an old video card so might have just died on its own right? There are no burn marks on the mobo. Would be gutted if that's gone as well. Could I have damaged the cpu or ram as well? Thanks for any insight!