well i went,and looked up this computer.pc world did a review of it,and said it doesnt have a agp slot for upgrading video.they said it had only 3pci slots.so something like
this is probably about the best upgrade you will be able to do with it.as far as what you said about it frying your board no card would do that fry your power supply maybe.emachines is kinda infamous for having bad power supplies.you might want to upgrade the power supply as well.take a look at the "power supply selection" link in my sig.