10x Xeon Phi Coprocessor cards, 4x E7-8895v2, 512gb of RAM, 6 PSU's, and more adapters and dongles than you can shake a stick at, with a 1500 Watt idle and a folding
Programming the Intel Xeon Phi Coprocessor Overview, by Tim Cramer - YouTube
Intel Xeon Phi 31S1P 8GB GDDR5 PCIe watercooled with Alphacool NexXxoS GPX - Intel Xeon Phi [1011804] from WatercoolingUK
Intel Knights Landing Yields Big Bang For The Buck Jump
If you wanted a Xeon Phi coprocessor for any reason: 31S1P 8GB for $150 at SabrePC | [H]ard|Forum