Best 900p £400 gaming pc build?

Solution
Went as cheap as i could without sacrificing build quality.

PCPartPicker part list / Price breakdown by merchant

CPU: Intel - Pentium G4600 3.6GHz Dual-Core Processor (£77.43 @ Amazon UK)
Motherboard: Asus - PRIME B250M-A Micro ATX LGA1151 Motherboard (£69.39 @ Amazon UK)
Memory: Corsair - Vengeance LPX 8GB (2 x 4GB) DDR4-2400 Memory (£63.99 @ Amazon UK)
Storage: Western Digital - Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (£41.98 @ Amazon UK)
Video Card: Zotac - GeForce GTX 1050 Ti 4GB Mini Video Card (£122.99 @ Amazon UK)
Case: Zalman - ZM-T3 MicroATX Mini Tower Case (£29.50 @ Amazon UK)
Power Supply:...
PCPartPicker part list / Price breakdown by merchant

CPU: Intel - Pentium G4560 3.5GHz Dual-Core Processor (£59.90)
Motherboard: Asus - PRIME B250M-K Micro ATX LGA1151 Motherboard (£62.24 @ Amazon UK)
Memory: Corsair - Vengeance LPX 8GB (2 x 4GB) DDR4-2666 Memory (£62.09 @ Amazon UK)
Storage: Western Digital - Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (£41.98 @ Amazon UK)
Video Card: PowerColor - Radeon RX 460 2GB Red Dragon Video Card (£74.99 @ Amazon UK)
Power Supply: Corsair - CXM 450W 80+ Bronze Certified Semi-Modular ATX Power Supply (£48.36)
Total: £349.56
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-05-30 19:13 BST+0100

+ this case

Game Max Elysium Gaming Case with 2 x 15 Blue LED Front Fan and Side Window - White https://www.amazon.co.uk/dp/B072L8BWMM/ref=cm_sw_r_cp_apa_lyBlzbBTNT5R7
 

Aeacus

Titan
Ambassador
Went as cheap as i could without sacrificing build quality.

PCPartPicker part list / Price breakdown by merchant

CPU: Intel - Pentium G4600 3.6GHz Dual-Core Processor (£77.43 @ Amazon UK)
Motherboard: Asus - PRIME B250M-A Micro ATX LGA1151 Motherboard (£69.39 @ Amazon UK)
Memory: Corsair - Vengeance LPX 8GB (2 x 4GB) DDR4-2400 Memory (£63.99 @ Amazon UK)
Storage: Western Digital - Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (£41.98 @ Amazon UK)
Video Card: Zotac - GeForce GTX 1050 Ti 4GB Mini Video Card (£122.99 @ Amazon UK)
Case: Zalman - ZM-T3 MicroATX Mini Tower Case (£29.50 @ Amazon UK)
Power Supply: SeaSonic - 450W 80+ Gold Certified Semi-Modular ATX Power Supply (£66.85 @ Amazon UK)
Total: £472.13
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-05-30 19:23 BST+0100

Few words.

This build will do in gaming @ 900p, provided you can find the extra 72 quid to get it.
 
Solution