http://uk.pcpartpicker.com/p/3D5Sh
PCPartPicker part list:
http://uk.pcpartpicker.com/p/3D5Sh
Price breakdown by merchant: http://uk.pcpartpicker.com/p/3D5Sh/by_merchant/
Benchmarks: http://uk.pcpartpicker.com/p/3D5Sh/benchmarks/
CPU: AMD FX-4300 3.8GHz Quad-Core Processor (£69.59 @ Aria PC)
Motherboard: ASRock 970 Pro3 R2.0 ATX AM3+ Motherboard (£50.76 @ Amazon UK)
Memory: Kingston HyperX 8GB (2 x 4GB) DDR3-1600 Memory (£53.79 @ Amazon UK)
Storage: Samsung Spinpoint F1 DT 500GB 3.5" 7200RPM Internal Hard Drive (£23.89 @ CCL Computers)
Video Card: MSI GeForce GTX 760 2GB TWIN FROZR Video Card (£169.97 @ Aria PC)
Case: Cooler Master Elite 430 ATX Mid Tower Case (£37.99 @ Aria PC)
Power Supply: Corsair CX 600W 80+ Bronze Certified Semi-Modular ATX Power Supply (£52.84 @ Amazon UK)
Optical Drive: Samsung SH-224DB/BEBE DVD/CD Writer (£11.98 @ Scan.co.uk)
Operating System: Microsoft Windows 8.1 (OEM) (64-bit) (£81.25 @ Amazon UK)
Total: £552.06
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-05-03 15:35 BST+0100)