This Octominer X12Ultra frame holds 12 GPU slots and, according to Octominer, is designed to offer reliability, efficiency, and power savings through its build. The four included 750W power supplies mean buyers can populate it with graphics cards without sourcing separate power hardware, though the GPUs themselves aren’t included. It’s a bare frame purchase, so the value here comes down to avoiding the cost of buying a case, motherboard, and power supplies separately when building a GPU mining setup. Buy Now at eBay