Check the listing for details. Mellanox ConnectX-4 40GB Ethernet Card CX4131A MCX4131A-BCAT Low Profile. Condition: Used. Listed at 29.49 USD. The CX4131A MCX4131A-GCAT MELLANOX ConnectX-4 50GB Ethernet Adapter Card is a low profile network card designed for high-speed connectivity. With a brand name of MELLANOX, this adapter card offers reliable performance for computer networking needs. Perfect for businesses or individuals seeking improved network capabilities, this product is an essential component for enhancing computer networking efficiency.The CX4131A MCX4131A-GCAT MELLANOX ConnectX-4 50GB Ethernet Adapter Card is a low profile network card designed for high-speed connectivity. With a brand name of MELLANOX, this adapter card offers reliable performance for computer networking needs. Perfect for businesses or individuals seeking improved network capabilities, this product is an essential component for enhancing computer networking efficiency.