Need help building a gaming pc?!

Why don't pick the parts(including os) and put in a store for assemble, it will be cheaper and you'll have whatever you want.
But for a cpu, get the i5-3570k, best cpu for gaming.
Card, either a 670 GTX from nvidia or 7970 from amd.
A dual channel kit of 8GB ram 1600 mhz between 1.35v and 1.5v.
A decent aircooler if you plan to overclock, like the hyper 212 evo or high end aircoolers like the phanteks line or noctua ones.

Thanks, and is it practical to get the 7970 and then for a second video card a GeForce GT 630 or would that not really make a difference?

You don't need a second card, specially a 630 GT, why do you want a 630 gt(really low end card) for ?
It's a nvidia card, and if you're thinking into getting it because of the physX forget it.

ok so just getting the 7970 should do it then? and do you recommend any gaming case?

do u need monitor+mouse+keyboard+windows?

i do need windows but i am good on a mouse keyboard and monitor

There're several ones, there's the nzxt phantom 410 and phantom, the cooler master HAF series, the storm enforcer, antec eleven hundred, corsair 300R,400R, 500R, etc.

This topic has been moved from the section CPU & Components to section Systems by Inzone

PCPartPicker part list: http://pcpartpicker.com/p/CWe4
Price breakdown by merchant: http://pcpartpicker.com/p/CWe4/by_merchant/
Benchmarks: http://pcpartpicker.com/p/CWe4/benchmarks/

CPU: AMD FX-8350 4.0GHz 8-Core Processor ($189.99 @ Amazon)
CPU Cooler: Xigmatek Dark Knight II SD1283 Night Hawk Edition 89.5 CFM CPU Cooler ($46.99 @ Newegg)
Motherboard: Asus Crosshair V Formula ATX AM3+ Motherboard ($234.34 @ Mwave)
Memory: Mushkin Blackline 16GB (2 x 8GB) DDR3-1600 Memory ($89.98 @ Outlet PC)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($74.98 @ Outlet PC)
Storage: Plextor M5S Series 128GB 2.5" Solid State Disk ($94.99 @ Microcenter)
Video Card: XFX Radeon HD 7970 3GB Video Card ($379.99 @ Newegg)
Case: NZXT Phantom (Black) ATX Full Tower Case ($99.99 @ Amazon)
Power Supply: EVGA SuperNOVA NEX750B BRONZE 750W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply ($89.99 @ Microcenter)
Optical Drive: Samsung SH-224BB DVD/CD Writer ($15.98 @ Outlet PC)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) ($89.98 @ Outlet PC)
Total: $1407.20
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-02-11 20:04 EST-0500)

should do it