£400 gaming build

[gogoman123]

hi all. plz suggest a build for a total of £400 which will be used for gaming (on a 42" 1080p moniter), browsing, streaming, etc.
parts I want: everything except moniter and windows (including mouse and keyboard).
I will be using websites in the uk like scan.co.uk, ebuyer.com, etc.

 

[djangoringo]

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i3-3220 3.3GHz Dual-Core Processor (£81.65 @ Aria PC)
Motherboard: MSI B75MA-P45 Micro ATX LGA1155 Motherboard (£45.30 @ Scan.co.uk)
Memory: Mushkin Blackline 8GB (2 x 4GB) DDR3-1600 Memory (£30.60 @ Aria PC)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive (£45.54 @ Aria PC)
Video Card: XFX Radeon HD 7850 1GB Video Card (£125.98 @ Dabs)
Case: Xigmatek Asgard II Black ATX Mid Tower Case (£28.15 @ Novatech)
Power Supply: XFX ProSeries 450W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply (£36.98 @ Novatech)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer (£12.98 @ Scan.co.uk)
Total: £407.18
(Prices include shipping, taxes, and discounts when available.)


or for less than 400 :

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Pentium G860 3.0GHz Dual-Core Processor (£47.94 @ Aria PC)
Motherboard: MSI B75MA-P45 Micro ATX LGA1155 Motherboard (£45.30 @ Scan.co.uk)
Memory: Mushkin Blackline 8GB (2 x 4GB) DDR3-1600 Memory (£30.60 @ Aria PC)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive (£45.54 @ Aria PC)
Video Card: XFX Radeon HD 7850 1GB Video Card (£125.98 @ Dabs)
Case: Xigmatek Asgard II Black ATX Mid Tower Case (£28.15 @ Novatech)
Power Supply: XFX ProSeries 450W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply (£36.98 @ Novatech)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer (£12.98 @ Scan.co.uk)
Total: £373.47
(Prices include shipping, taxes, and discounts when available.)