The Sun IB HCA PCIe is a dual-port 20Gb/sec PCI Express module that offers twice the performance over Single Data Rate offerings coupled with even lower latencies.Now you can take advantage of high-performance, low-latency I/O interconnect technology in a single-wide Express Module form factor. The Sun Dual Port DDR IB Host Channel Adapter PCIe Express Module supports RDMA and OS bypass technologies that can reduce memory copy overhead, improving CPU utilization.