Mellanox ConnectX-6 Dx Dual-Port 100GbE QSFP56 PCIe NICForm Factor: PCIe adapter Network Card Brand & Model: Dell Mellanox ConnectX 6 Dx Ports and Speed: 2x100GbE Interface: QSFP56 Dell Server 14th Gen Compatibility: R640, R740, R740XD, R740XD2, R840, R940, R940xa, C4140, C6420, FC640. Dell Server 15th Gen Compatibility: R650, R650xs, R750, R750xs, R750xa, R6515, R6525, R7515, R7525, T550, C6520, C6525. Dell Server 16th Gen Compatibility: R660, R660xs, R760, R760XD2, R760XS, R760XA, R860, R960, R6615,