£450,20 Intel CPU Core i7 3930K (C2) Enthusiast Unlocked Six Core Socket 2011 Processor
http://www.scan.co.uk/products/intel-core-...t-cache-130w-re £839,69 Gigabyte GeForce GTX 690 NVIDIA Graphics Card - 4GB
http://www.scan.co.uk/products/4gb-gigabyt...3072-3-x-dl-dvi £204,95 Asus P9X79 Pro Intel X79 Socket 2011 Motherboard
http://www.scan.co.uk/products/asus-p9x79-...ie-30-(x16)-atx £126,84 2x Seagate 1TB SATA 3 Performance Hard Drive OEM ST1000DM003
http://www.scan.co.uk/products/1tb-seagate...che-8ms-ncq-oem £79,39 Corsair Memory Vengeance LP Black 16GB DDR3 1600 MHz CAS 9 XMP Quad Channel Desktop Sandybridge
http://www.scan.co.uk/products/16gb-(4x4gb...-9-9-24-xmp-15v £196,62 XFX P1-1000-BLUK Pro Series Black Edition 1000W Modular Power Supply (PSU)
http://www.scan.co.uk/products/1000w-xfx-p...12v-atx-v22-psu £61,54 Pioneer BDR-207DBK Blu-ray Writer 5.25" SATA
http://www.scan.co.uk/products/pioneer-bdr...-sata-black-oem £160,76 Lian Li PC-Z70B Diamond series Black Case Full Tower
http://www.scan.co.uk/products/lian-li-pc-...-usb-30-w-o-psu £66,17 Phanteks PH-TC14PE_BK Premium Intel and AMD CPU Cooler
http://www.scan.co.uk/products/phanteks-hi...r-black-edition £189,88 2x OCZ Technology 128GB Vertex 4 SSD - Solid State Drive - VTX4-25SAT3-128G PC/MAC
http://www.scan.co.uk/products/128gb-ocz-v...430mb-s-120k-io = £2 376,04
...and before you ask: yes, this build is VERY over-the-top. But basically everything you get there is the best you can have. I didn't have enough money left for second GTX690 though, but anyway: 2x GTX690 equals four GPUs. It probably won't scale well.
Anyway, here's a much more reasonable build:
£258,20 Intel CPU Core i7 3770K Quad Core IvyBridge Processor Retail
http://www.scan.co.uk/products/intel-core-...cache-35x-ratio £407,62 Gigabyte 2GB GeForce GTX 680 3X OC Windforce 3X NVIDIA Graphics Card
http://www.scan.co.uk/products/2gb-gigabyt...-cores-15362xdl £159,00 Asus P8Z77-V PRO Intel Z77 Socket 1155 Ivybridge Ready Motherboard
http://www.scan.co.uk/products/asus-p8z77-...-dvi-i-hdmi-atx £63,47 Seagate 1TB SATA 3 Performance Hard Drive OEM ST1000DM003
http://www.scan.co.uk/products/1tb-seagate...che-8ms-ncq-oem £39,74 Corsair Memory Vengeance Jet Black Low Profile 8GB DDR3 1600 MHz CAS 9 XMP Dual Channel Desktop
http://www.scan.co.uk/products/8gb-(2x4gb)...-9-9-24-xmp-15v £108,78 Corsair CP-9020006-UK AX 650W Professional Gold Modular Power Supply (PSU)
http://www.scan.co.uk/products/650w-corsai...vquient-fan-atx £13,46 LG GH24NS90.AUAA50B
http://www.scan.co.uk/products/lg-gh24ns90...-sata-black-oem £72,55 R3 Black Case with USB 3.0 from Fractal Design New Version
http://www.scan.co.uk/products/fractal-des...sorbing-w-o-psu £35,98 Thermalright TRUE Spirit 140mm Fan
http://www.scan.co.uk/products/thermalrigh...775-and-am2-am3 £94,94 OCZ Technology 128GB Vertex 4 SSD - Solid State Drive - VTX4-25SAT3-128G PC/MAC
http://www.scan.co.uk/products/128gb-ocz-v...430mb-s-120k-io = £1 253,74
It's basically as good as it needs to be, and it doesn't cost an arm and a leg.
This post has been edited by yojo2 on Wednesday, Aug 1 2012, 16:08