Your search for "MCX516A-CCAT" revealed the following:
nVidia Mellanox MCX516A-CCAT ConnectX-5 2x 100GB QSFP28 PCIe 3.0 x16 NIC
SKU: NSB-9023
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
$ 881.99
• Only 2 remaining
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NEW nVidia Mellanox MCX516A-CCAT ConnectX-5 2x 100GB QSFP28 PCIe 3.0 x16 NIC
SKU: NSN-1095
Condition: New
Shipping: Overnight Options
Warranty: 365 days
$ 919.99
• 4 in stock
Call if you need more