Is the Dell Dimension 3000 case an ATX? My friend is buying a new mobo and needs to know if its compatible... Thnanks (PS, i know this is off topic, but i would like to know if 512mb DDR2 VRAM is better to have than 256mb DDR3 VRAM (The mem speed of the DDR2 is 1400 and the DDR3 is 1600))-Thanks

