Using a AMD APU. The CPU is stronger and you get decent graphics that is enough for 720p gaming.

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: AMD A10-5800K 3.8GHz Quad-Core Processor (£92.62 @ Amazon UK)
Motherboard: ASRock FM2A75 Pro4 ATX FM2 Motherboard (£59.54 @ Amazon UK)
Memory: Kingston 8GB (2 x 4GB) DDR3-1600 Memory (£30.56 @ CCL Computers)
Storage: OCZ Agility 3 60GB 2.5" Solid State Disk (£42.99 @ Amazon UK)
Case: Cooler Master Elite 371 ATX Mid Tower Case (£35.87 @ CCL Computers)
Power Supply: Corsair Builder 500W 80 PLUS Certified ATX12V Power Supply (£47.99 @ Novatech)
Total: £309.57
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2012-12-10 00:39 GMT+0000)