$600-800 Arma 2 build

PCPartPicker part list: http://pcpartpicker.com/p/BhI7
Price breakdown by merchant: http://pcpartpicker.com/p/BhI7/by_merchant/
Benchmarks: http://pcpartpicker.com/p/BhI7/benchmarks/

Motherboard: ASRock H77M Micro ATX LGA1155 Motherboard ($69.99 @ Newegg)
Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1600 Memory ($47.99 @ Newegg)
Storage: Seagate Barracuda 500GB 3.5" 7200RPM Internal Hard Drive ($54.98 @ Outlet PC)
Video Card: PowerColor Radeon HD 7850 2GB Video Card ($179.98 @ Newegg)
Case: Corsair 200R ATX Mid Tower Case ($34.99 @ Newegg)
Power Supply: Antec Neo Eco 520W 80 PLUS Certified ATX12V / EPS12V Power Supply ($39.99 @ Newegg)
Optical Drive: LG GH24NS72 DVD/CD Writer ($22.75 @ Amazon)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) ($89.98 @ Outlet PC)
Other: intel 3570k ($224.00)
Total: $764.65
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-02-03 15:14 EST-0500)