This is my gaming computer that I have been upgrading for the past several years. I initially built it with a GTX 970, DDR3 RAM, an Intel Xeon E3, and a Phantom 410 case. This is the latest iteration that I completed within the last couple weeks, and at this point it is a completely new machine from the one that I first built years ago. Most recent additions/changes are a new Phanteks RGB case, a liquid CPU cooler to replace my Hyper 212 LED, and a vertical GPU mount.
All prices listed should be accurate as to exactly how much I paid for each individual part.
Uses: I mainly play video games on it, since it was built as a gaming computer. Currently I play Fortnite and I've been giving the new Apex Legends a try on it. I keep settings set fairly low on most games so I can (try to) achieve 144fps for my 144hz monitor (which, by the way, was probably the best investment I've made as a competitive FPS player, assuming you have a machine powerful enough to output the required frames).
The i7 is currently overclocked to 4.8ghz.
The GPU mount is universal and requires no case modifications at all. I believe this means that it sits farther away from the rear of the case, and I don't have very much clearance between the GPU and the push/pull front-mounted radiator. But it does fit with everything seeming to work just fine.