i7-3820
P9X79-LE
8x8gb ARES RAM
GTX 210
120gb Samsung 840 SSD
450W Antec PSU
My mate already had 5TB of HDD storage.
This system is going to run finite element analysis - the software recommends 8gb per CPU, so I opted for a quad core with virtual cores, and 64gb RAM - it's hard to find boards with more than 64gb RAM so this is really as much as could be fit in. To get more than that we would have had to swap to server architecture and the price would have been a lot more.
W7's performance tests maxed out the RAM and HDD rating, and the CPU got a 7.7 (it's not OC'd or anything, we'll have a look at temps under load first).
I really like this box, the P9X79 is a nice board.