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
HP Intel Xeon Phi Coprocessor 7120P E2M34A 732636-001 G65757-351 [E2M34A / 732636-001] - $599.99 : Professional Multi Monitor Workstations, Graphics Card Experts
Intel's 50-core champion: In-depth on Xeon Phi | Extremetech
Nvidia calls out Intel for cheating in Xeon Phi vs. GPU benchmarks | Ars Technica
If you wanted a Xeon Phi coprocessor for any reason: 31S1P 8GB for $150 at SabrePC | [H]ard|Forum
Catsay plays with Xeon Phi - Build Logs - Level1Techs Forums