Consuming 56 kW, OSS GPUltima supports up to 128 double-wide interconnected accelerators. There are 64 OSS PCIe Gen3 x16 adapters and cables between OSS servers and OSS High Density Compute Accelerators (HDCA), each containing 16 NVIDIA® Tesla® K80 GPU accelerators and 32 Mellanox EDR 100Gbs InfiniBand adapters and cables connecting GPUs through 36-port InfiniBand switch. PCIe expansion systems provide high-speed connectivity between CPU and IO cards.