I am looking for a more powerful PS than the one that came with my Dell Dimmension 4700 (305W i believe) Because before i had a 7600GT and other upgrades and i didn't think to upgrade my PSU. So the 7600 broke and now im getting an 8600GT or somewhere close to that no higher though, and i need to upgrade. I was wondering if you could use a 20 pin or 20+4 pin on a 24 pin main connector for mobo, or would that fry or not boot. There arent many 24 pins to choose from that are ATX and in my price range, I just need to know if it would work or do i have to have 24 pin. Thank You. Edit: Also is my computer only ATX or could i use ATX12v or any other option, thank you again.