Fanless Haswell-E / Haswell-EP tower (yes, you read it right)

Deltatronic launches a jaw-dropping system with a "heavy duty convector cooler". Basically a whole side panel of the case is a single piece of extruded aluminum with large cooling fins. Various CPUs and graphics cards are available for configuration, including several DDR4-ready Haswell-E i7s and Haswell-EP Xeons up to the 10 cores / 20 threads E5-2687W v3 :

✓ Intel Core i7 5820K (Haswell-E, 140W TDP)
✓ Intel Core i7 5930K (Haswell-E, 140W TDP)
✓ Intel Core i7 5960X (Haswell-E, 140W TDP)
✓ Intel Xeon E5-1650 v3 (Haswell-EP, 140W TDP)
✓ Intel Xeon E5-1660 v3 (Haswell-EP, 140W TDP)
✓ Intel Xeon E5-2687W v3 (Haswell-EP, 160W TDP)

✓ NVIDIA GeForce 210
✓ NVIDIA GeForce GTX 750
✓ NVIDIA GeForce GTX750Ti OC
✓ NVIDIA GeForce GTX970
✓ NVIDIA GeForce GTX980
✓ PNY NVIDIA Quadro K2200
✓ PNY NVIDIA Quadro K4200

Ultimate performance and ultimate silence don't come cheap, though. Prices start at 1,990 euros.

Source: Deltatronic