My friend wants to build his first gaming rig for £600 can you guys help me

Solution
Without just buying the cheapest crap you can get and buying good quality parts.

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i3-6100 3.7GHz Dual-Core Processor (£92.91 @ Amazon UK)
Motherboard: Gigabyte GA-B150M-DS3H Micro ATX LGA1151 Motherboard (£67.62 @ CCL Computers)
Memory: G.Skill Ripjaws V Series 16GB (2 x 8GB) DDR4-2133 Memory (£62.99 @ Novatech)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (£42.99 @ Amazon UK)
Video Card: Gigabyte GeForce GTX 1060 6GB 6GB WINDFORCE OC 6G Video Card (£242.99 @ Ebuyer)
Case: Cooler Master N200 MicroATX Mini Tower Case (£45.90 @...

Zerk2012

Titan
Ambassador
Without just buying the cheapest crap you can get and buying good quality parts.

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i3-6100 3.7GHz Dual-Core Processor (£92.91 @ Amazon UK)
Motherboard: Gigabyte GA-B150M-DS3H Micro ATX LGA1151 Motherboard (£67.62 @ CCL Computers)
Memory: G.Skill Ripjaws V Series 16GB (2 x 8GB) DDR4-2133 Memory (£62.99 @ Novatech)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (£42.99 @ Amazon UK)
Video Card: Gigabyte GeForce GTX 1060 6GB 6GB WINDFORCE OC 6G Video Card (£242.99 @ Ebuyer)
Case: Cooler Master N200 MicroATX Mini Tower Case (£45.90 @ Amazon UK)
Power Supply: Corsair CXM 450W 80+ Bronze Certified Semi-Modular ATX Power Supply (£49.86 @ BT Shop)
Total: £605.26
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-10-16 15:59 BST+0100
 
Solution
For a bit more you can get something a lot better.
PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-6500 3.2GHz Quad-Core Processor (£181.90 @ Amazon UK)
Motherboard: Gigabyte GA-H170M-D3H Micro ATX LGA1151 Motherboard (£94.99 @ Kustom PCs)
Memory: Panram Ninja-V 16GB (2 x 8GB) DDR4-2400 Memory (£49.99 @ Overclockers.co.uk)
Storage: Patriot Torch LE 120GB 2.5" Solid State Drive (£34.99 @ Amazon UK)
Video Card: Asus Radeon RX 480 4GB Dual Video Card (£213.17 @ More Computers)
Case: Fractal Design Core 1000 USB 3.0 MicroATX Mid Tower Case (£39.99 @ Ebuyer)
Power Supply: XFX XT 500W 80+ Bronze Certified ATX Power Supply (£42.98 @ Novatech)
Total: £658.01
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-10-16 15:57 BST+0100
 

ryguybuddy

Estimable
Jul 3, 2016
1,773
0
3,460
PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-6500 3.2GHz Quad-Core Processor (£181.90 @ Amazon UK)
Motherboard: Asus H110M-K Micro ATX LGA1151 Motherboard (£47.99 @ Amazon UK)
Memory: Kingston HyperX Fury Black 8GB (1 x 8GB) DDR4-2133 Memory (£37.94 @ BT Shop)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (£42.99 @ Amazon UK)
Video Card: EVGA GeForce GTX 1060 3GB 3GB SC GAMING Video Card (£200.67 @ CCL Computers)
Case: Thermaltake V3 Black ATX Mid Tower Case (£39.98 @ Novatech)
Power Supply: Corsair CXM 450W 80+ Bronze Certified Semi-Modular ATX Power Supply (£49.86 @ BT Shop)
Total: £601.33
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-10-16 16:00 BST+0100

Here is a good 600 pound build perfect for 1080p gaming. It comes with a popular Intel Core i5 Quad-Core processor and a Nvidia GTX 1060 3GB edition that can run most 1080p games at max settings 60fps.
 

carlopadilla36

Honorable
Dec 14, 2013
66
1
10,640
i3-6100 will do the job
PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i3-6100 3.7GHz Dual-Core Processor (£92.91 @ Amazon UK)
Motherboard: MSI B150M MORTAR Micro ATX LGA1151 Motherboard (£75.98 @ YoYoTech)
Memory: Corsair Vengeance LPX 8GB (2 x 4GB) DDR4-2133 Memory (£42.41 @ Novatech)
Storage: A-Data Premier SP550 120GB 2.5" Solid State Drive (£36.72 @ Amazon UK)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (£42.99 @ Amazon UK)
Video Card: MSI GeForce GTX 1060 6GB 6GB 6GT OC Video Card (£238.99 @ Amazon UK)
Case: Fractal Design Core 1000 USB 3.0 MicroATX Mid Tower Case (£39.99 @ Ebuyer)
Power Supply: EVGA 500W 80+ Bronze Certified ATX Power Supply (£44.99 @ Overclockers.co.uk)
Total: £614.98
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-10-16 16:03 BST+0100