I am looking to build my first PC for under £750. These are the specs i have chosen. Any advice would help a lot. Thanks.
Intel Core i5 3450S,1155, Ivy Bridge, Quad Core, 2.8GHz, 5 GT/s DMI, 650MHz GPU, 6MB Smart Cache, 31x Ratio, 65W
Gigabyte GA-Z77-DS3H, Intel Z77, S 1155, DDR3, SATA III - 6Gb/s, SATA RAID, PCIe 3.0 (x16), D-Sub/ DVI-D/ HDMI, ATX
FX-787A-CNFC - 2GB XFX Radeon HD 7870 Core Edition, 4800MHz GDDR5, 28nm, GPU 1000MHz, 1280 Cores, DL DVI/HDMI/mDP
1TB Seagate ST1000DM003 Barracuda 7200.14 SATA 6Gb/s 7200rpm 64mb Cache 8ms NCQ OEM
8gb (2 4GB) 1600mhz Cl9 Ddr3 Vengeance Memory Module Kit
750W Powercool PC750UM, Modular, 80% Eff', 80 PLUS, SLI/CrossFire, EPS 12V, Quiet Fan, ATX v2.2, PSU
Logitech K360 Wireless Keyboard, 6 Hot Keys and 12 Programmable F Keys
21.5" AOC E2262VWH/BK LED Monitor, 1920x1080, 2ms, 250cd/m², 50M:1, VGA/ HDMI
Aerocool Strike-X Advance Mid Tower Gaming Case
(x3) 120mm Silverstone SST-FF122B, with cleanable Fan Filter with Magnet
Samsung 24x SATA DVD Writer
Intel Core i5 3450S,1155, Ivy Bridge, Quad Core, 2.8GHz, 5 GT/s DMI, 650MHz GPU, 6MB Smart Cache, 31x Ratio, 65W
Gigabyte GA-Z77-DS3H, Intel Z77, S 1155, DDR3, SATA III - 6Gb/s, SATA RAID, PCIe 3.0 (x16), D-Sub/ DVI-D/ HDMI, ATX
FX-787A-CNFC - 2GB XFX Radeon HD 7870 Core Edition, 4800MHz GDDR5, 28nm, GPU 1000MHz, 1280 Cores, DL DVI/HDMI/mDP
1TB Seagate ST1000DM003 Barracuda 7200.14 SATA 6Gb/s 7200rpm 64mb Cache 8ms NCQ OEM
8gb (2 4GB) 1600mhz Cl9 Ddr3 Vengeance Memory Module Kit
750W Powercool PC750UM, Modular, 80% Eff', 80 PLUS, SLI/CrossFire, EPS 12V, Quiet Fan, ATX v2.2, PSU
Logitech K360 Wireless Keyboard, 6 Hot Keys and 12 Programmable F Keys
21.5" AOC E2262VWH/BK LED Monitor, 1920x1080, 2ms, 250cd/m², 50M:1, VGA/ HDMI
Aerocool Strike-X Advance Mid Tower Gaming Case
(x3) 120mm Silverstone SST-FF122B, with cleanable Fan Filter with Magnet
Samsung 24x SATA DVD Writer