No. According to the listed specifications, the Intel X520-SR2 does not support iWARP/RDMA. However, it does include intelligent offloads and Intel Data Direct I/O Technology to improve networking efficiency.

The Intel X520-SR2 is a dual-port 10GbE PCIe server adapter with SFP+ fiber connectivity. It is designed for data center, virtualization, and unified storage environments. Based on the Intel 82599 controller, it supports flexible, high-performance networking for demanding workloads such as HPC, clustered databases, and video delivery.