QNAP QXG-10G2SF-CX4 - Network adapter - PCIe 3.0 x8 low profile - 10 Gigabit SFP+ x 2 - for QNAP ES1640DC V2, TS-1277, 253, 453, 473, 677, 853, 877, 977, TVS-2472, 473, 673, 872, 873

10 GbE network expansion card The 10 GbE network expansion card uses a Mellanox® ConnectX® SmartNIC controller to accelerate backup/restore tasks for an ever-growing amount of data and intensive data transfer. iSER is also supported to optimize VMware® virtualization performance.