Is this a good Gaming Desktop PC Build?

Thanks for helping me out guys, Is it a good budget gaming PC that can run BF4 on atleast Medium graphics with no problem? It will be used for gaming purposes only, CPU - AMD Athlon II X4 750K 3.4GHz Quad-Core Processor $79.99 CPU Cooler - SilenX EFZ-120HA5 86.0 CFM Fluid Dynamic Bearing CPU Cooler $24.99 Motherboard - ASRock FM2A75M PRO4+ Micro ATX FM2+ Motherboard $64.99 Memory - GeIL EVO Veloce Series 8GB (2x 4GB) DDR3-1600 Memory $62.99 Storage - Samsung Spinpoint M8 750GB 2.5" 5400RPM Internal Hard Drive $49.99 Video Card (GPU) - Asus Radeon HD 7790 1GB Video Card $114.99 Case - Topower TP-6208BB-450 (Black/White) ATX Mid Tower Case w/450W Power Supply $34.99 Case Fan - Rosewill RFX-120 87.5 CFM 120mm Fan $4.79 Power Supply - (Don't know if I need one, if so, how much W?, note the 450W Power Supply deliverd with the case.) Optical Drive - Pioneer BDC-207DBK Blu-Ray Reader, DVD/CD Writer $45.37 Operating System - Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) $88.99 Thank you so much for your time! :)