Make sure you power supply is not an advanced 750 watts and you should be fine. The motherboard will take the card.
Also make sure you have a good case.
So a 750 be too much for my motherboard? What would you say the safe zone of wattage would be? (450 minimum of course)
I recently bought a GTX 460 1 GB, I recommend it over the 768 MB version because it has more memory bandwidth (256-bit for the 1 GB version vs. 192-bit for the 768 MB version).
But that's not the point I wanted to bring, Emperus and Maziar are right for the power supply, make sure you have enough juice (450 Watt or more). But another important thing to check on your PSU: make sure you have 2 PCI Express power connectors, this is what is required for this card. Worst case scenario you can always use molex-to-PCI-Express-adapters, but I think it's less recommended.
Thanks for the info,and yes I was considering the 1GB over the 768MB.