Built quite a few years ago now, built around a GTX 580 that replaced a busted ATI card. Brought over the drives from a previous build to make a Raid 0 with the 300gb drives, with the 3x1.5tb drives as storage. Bought the U30 before 120hz drives because the norm because I also use it for running websites and doing other work, great monitor for general use.
I know the inside is pretty messy (not to mention dusty since I haven't cleaned it out fully in a few months), but there are just so many cables, there are 14 cables for all the drives, then another 2 for the PSU, 1 for the Xonar Essence, another set for the Cathodes, all the motherboard power and case fan cables and the USB bay in the bottom, also note that the cables are already special 4 in-line Sata connectors. There is just no room left at the back either.
If I wanted to take it apart I could probably improve it, but it gets the job done, and the back of the case was already bulging with all the cables.
As for overclocking, it can crack 4ghz but not 24/7, and it's stable speed was 3.8ghz, although I don't run it OC'd because doing that screws with Battlefield 3.
Pictures taken on a Galaxy Note 2 with a Otterbox Defender Case.
I'm thinking of getting a 770 when BF4 comes out. If I had the money I'd build a NAS box to replace the storage inside, and if I had a load of money, I'd buy a second system to use as a 120hz Lightboost 2 dedicated gaming rig.
Interesting little factoid: My system scored P6666 3DMarks in 3D Mark Eleven... :O
It also doubles as room heater in winter.