GTX460 crossfire compatibility and computer building help?

Im building a new computer and i hav some questions.

1. does GTX460 have crossfire compatibility?

2. Does it work with MSI X58-Pro-E?

3 should i use two GTX460 or 1 GTX 570?

4 Do all these parts work together?

Motherboard: MSI X58-Pro-E

CPU: I7 950

RAM: 6G Kit 1600 G.Skill-NQ

HDD: Seagate SATA3 2tb

Writer: SATA Blu-Ray Writer LG

5. How much wattage will i need in my power suplly?

6. Will it all fit in my Antec 900 case?|||1. No GTX460 is an nvidia card it does not have crossfire there's is called SLI. AMD(ATI)is crossfire but yes the GTX460 is SLI ready

2. MSI X58A-GD45 supports both crossfire and SLI

3. that would be a personal preference,my personal preference is one bigger card less hassle

4. Yes all compatible

5. Probably minimum 700w depending if you go single GPU or SLI and depending on what other

peripherals you might have

6. Decent size case should fit no problems