Chelsio T420-CR Fiber Optic Card. T420-CR 10 GBE PCIE SFP+ 2PORT LOW PROFILE UNIFIED WIRE ADAPTER GBE. PCI Express x8 - 2 Port - 10GBase-X - Internal New CHELSIO COMMUNICATIONS T420-CR chelsio communications t420-cr t420-cr 10 gbe pcie sfp+ 2port low profile unified wire adapter