Samsung WriteMaster SH-S222BB/BEBE 22x DVD±R, 12x DVD±R, DVD+RW x8/-RW x6, SATA, Black, OEM
£13.18
1GB Asus GTX 550 Ti, 4104MHz GDDR5, GPU 900MHz, Shader 1800MHz, 192 Cores, Dual Link DVI-I/ D-Sub/ HDMI
£89.86
1TB Hitachi 0F13180, Deskstar 7K1000.D, 3.5" HDD, SATA III - 6Gb/s, 7200rpm, 32MB Cache, 8ms, OEM
£76.92
Intel Core i5 2380P, S 1155, Sandy Bridge, Quad Core 3.1GHz, 6MB Smart Cache, 31x Ratio, 95W, Retail
£142.98
4GB Corsair DDR3 XMS3, PC3-12800 (1600), Non-ECC Unbuffered, CAS 9-9-9-24, XMP, 1.65V
£19.68
Gigabyte GA-H61M-S2-B3, Intel H61, S 1155, DDR3, SATA II - 3Gb/s, PCIe 2.0 (x16), VGA On Board, Micro ATX
£39.13
430W PSU, Corsair Builder Series CMPSU-430CX, 80% Eff', Uncertified, Quiet Fan, ATX v2.3
£36.52
Microsoft Windows 7 Home Premium 64 Bit SP1, Operating System, Single, - OEM
£72.08
InWin EN036 X-Rider Micro-ATX Black Minitower Performance Case
£26.38
Total: $827,52,sorry mate,there's no way you can get a gaming rig for $700,neither for $827,52,but at least it can run most games on high,well BF3 gor example medium/high 1920x1080