T520-CR: 2-port Low Profile 1/10GbE Unified Wire Adapter with PCIe 3.0 x8 Interface, 32K connections, SFP+ connector

$658.00

T580-LP-CR: 2-port Low Profile 10/40GbE Unified Wire Adapter with PCIe 3.0 x8 Interface, 32K connections, QSFP connector

$830.00