Can anyone recommend a build for under £400 for gaming

AirSKiller

Honorable
Feb 16, 2013
185
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10,710
I can't make you a full list right now (Send me a Personal Mensage if you want that) but I can say, go with a A10, FM2 socket and FAST RAM 1866MHz mininum! That should be the barebones
 
PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i3-3220 3.3GHz Dual-Core Processor (£83.99 @ Aria PC)
Motherboard: ASRock B75M-GL Micro ATX LGA1155 Motherboard (£47.99 @ Novatech)
Memory: Patriot Intel Extreme Master, Limited Ed 8GB (2 x 4GB) DDR3-1600 Memory (£36.23 @ Amazon UK)
Storage: Seagate Barracuda 500GB 3.5" 7200RPM Internal Hard Drive (£35.99 @ Aria PC)
Video Card: EVGA GeForce GTX 650 Ti 1GB Video Card (£123.78 @ Amazon UK)
Case: NZXT Source 210 (White) ATX Mid Tower Case (£31.18 @ Scan.co.uk)
Power Supply: Corsair Builder 500W 80 PLUS Certified ATX12V Power Supply (£47.99 @ Novatech)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer (£12.98 @ Scan.co.uk)
Total: £420.13
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-02-17 19:10 GMT+0000)

This will be considerably better for gaming.

If you have to, lower the GPU to a 7770 and it will still be better.