Computer parts help

[imported_Helios]

Ok, so I've already went ahead and bought this processor ( got for cheaper at microcenter ):

Intel Core i7 920
http://www.newegg.com/Product/...x?Item=N82E16819115202

I haven't purchased anything else, but what I've selected so far is:

Motherboard - GIGABYTE GA-EX58-UD3R LGA 1366 Intel X58 ATX Intel Motherboard
http://www.newegg.com/Product/...x?Item=N82E16813128375

RAM - G.SKILL 6GB (3 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666)
http://www.newegg.com/Product/...x?Item=N82E16820231223

Hard Drive
http://www.newegg.com/Product/...x?Item=N82E16822152102

Video Card - SAPPHIRE 100258-1GL Radeon HD 4850 1GB 256-bit GDDR3
http://www.newegg.com/Product/...x?Item=N82E16814102802

DVDR
http://www.newegg.com/Product/...x?Item=N82E16827106263

As far as I know, all these parts are compatible. Am I correct in this assumption? Also, I need a power supply but am not sure how much power I actually need and what type of PCI-E power adapter I would need for that video card. If anyone can also suggest maybe a slightly lower-end graphics card for cheaper but still a good one, that would be great. I'm not too into PC gaming, but I do intend to run dual displays and do heavy graphics work. If it helps, I have no intention of OCing or anything.

Thanks in advance!

 

[Blain]

Those parts should work together, but they'll need a power source to do so.
A http://www.newegg.com/Product/...x?Item=N82E16817703005 should do it for you.