All purpose rig, I use it for gaming, audio production, video production, and as my HTPC.
Games such as Robocraft, BF4, World Of Warships, World of Tanks, Rfactor2, Simraceway, Happywars, Battleblock Theatre, Borderlands, and Warface. Audio production such as making industrial/metal music. Video production: Car racing videos, irl and ingame, and music. And alll mah Animu, so much animu and movies.
Why are the HDDs so expensive? Well, because enterprise drives mofu! That 24/7 reliability. :o
UPDATE: Just got the 390x, after driver install issues I got it working on triple monitors. BUT for some reason (if only had an hour to tinker so far) it is displaying 30fps on the side monitors but 60hz in the center. UPDATE 2: 16JUL2015; No progress on the 30/60/30 issue, sold 1 of the Sony's, making the move to do double (or possibly triple if the frame rates stay high enough) Acer XG270HU's.
UPDATE 2: Dual 390x worked great until the LEPA B1000M shat the bed during a session of Warface utilizing both cards@1440p w/144hz. Swapped out the mobo and processor combo for a Intel i7 4790 and Gigabyte Z97x UD3H utilizing an EVGA G2 1300w PSU.
For those of you out there, this isn't my first rodeo mates. So tell me something I don't already know. Until I can find something that can max out 6 or more cores besides torture testing I'll stick with what's already in my 4U Rack. This build was originally completed in March, 2015 to work aside with my FX-6300 system backstateside. (Originally a FX-8350/Crosshair V Formula Z utilizing triple 270x 4GB's.)