Suggestions on this build?

I will be using this computer for gaming and autocad. I only have $1000 usd to spend though. Just curious if it's good enough and if this works


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

CPU: Intel Core i5-3450 3.1GHz Quad-Core Processor ($189.99 @ Amazon)
Motherboard: ASRock H77 Pro4/MVP ATX LGA1155 Motherboard ($87.55 @ Newegg)
Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1600 Memory ($37.99 @ Newegg)
Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1600 Memory ($37.99 @ Newegg)
Storage: OCZ Vertex 4 128GB 2.5" Solid State Disk ($114.99 @ Microcenter)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($74.99 @ NCIX US)
Video Card: Sapphire Radeon HD 7950 3GB Video Card ($279.99 @ Newegg)
Case: Cooler Master Storm Stryker (White) ATX Full Tower Case ($144.84 @ NCIX US)
Power Supply: XFX 550W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply ($53.99 @ NCIX US)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer ($15.98 @ Outlet PC)
Total: $1038.30
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2012-11-24 15:42 EST-0500)