Thanks guys.. I'm settled on a GTX 460. I don't know what the motherboard is on my desktop PC, is supposedly ATX compliant from what I've found so far. The computer is a DELL XPS 630 and I couldn't find the model online in the specs, nor can I check inside the case as I'm currently not in the country. I would like to know if the GTX 460 will work. I guess it should... Sorry again to be a newb around computers again.