GTX 980 in a mini PC. The ZBox EN980 is one of the first mini PCs to be VR Ready and, surprisingly, it runs relatively cool and quietly thanks to its dense cooling system. Nonetheless, idling fan noise could have been quieter and the system is still missing some key features we find should be common for its $1600 USD price.
http://www.notebookcheck.net/Zotac-ZBOX-Magnus-EN980-Mini-PC-Review.171891.0.html