What is the Mellanox MCX4121A-ACUT?
The Mellanox MCX4121A-ACUT is a SFP optical transceiver module, listed by the manufacturer as "Mellanox ConnectX-4 Lx EN network interface card, 25GbE dual-port SFP28, PCIe3.0". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.