Build me a pc?

This is the best I could do, not sure how well it would do with the various COD games.

PCPartPicker part list / Price breakdown by merchant

CPU: AMD Athlon X4 880K 4.0GHz Quad-Core Processor (£69.66 @ CCL Computers)
Motherboard: ASRock A88M-G/3.1 Micro ATX FM2+ Motherboard (£62.26 @ More Computers)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1866 Memory (£35.22 @ Ebuyer)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (£39.90 @ Amazon UK)
Video Card: Zotac GeForce GTX 750 Ti 2GB Video Card (£84.99 @ Amazon UK)
Case: Corsair 200R ATX Mid Tower Case (£52.99 @ CCL Computers)
Power Supply: SeaSonic S12II 620W 80+ Bronze Certified ATX Power Supply (£59.99 @ Amazon UK)
Total: £405.01
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-06-09 18:39 BST+0100
 


What do you include in the $400 budget? Do you have/need a Windows license? Monitor? Keyboard + mouse?
 


No just the pc itself no monitor keyboard or mouse and Windows 8 (64bit) should be fine