Our Intel 25Gb NICs and OS can support iWARP, Mellanox support RDMA. Which one to use depends on your requirements. If your current network is set up with iWARP, then you can choose Intel Based NICs. If you do not use iWARP in your existing network, or would like to build a new one, Mellanox NICs support RoCE, and RoCE is able to deliver precisely the three key benefits that IWARP cannot achieve: high throughput, low latency, and low CPU utilization. Furthermore, the IWARP technology has not been well adopted by the market, so using RoCE is more reliable and more scalable. You can contact your sales manager for more details.