The ThinkStation Thunderbolt 3 PCIe card adds Thunderbolt 3 compatibility to your select WS allowing you to achieve breathtaking file transfers of up to 40Gbps, which is twice the speed of Thunderbolt 2 and four times faster than USB3.1 Gen2. Bandwidth DisplayPort 1.2 capable with 4K video throughout Daisy-Chain up to 6 devices.