HP Dual TBT4 PCIe x4 Low Profile CardHP Dual TBT4 PCIe x4 Low Profile Card The HP Dual TBT4 PCIe x4 Low Profile Card is a compact, high performance expansion solution designed for professional workstations and small form factor PCs. Built around Thunderbolt 4 technology, this PCIe x4 card unlocks a versatile expansion bay for fast data transfer to external NVMe storage, high speed network modules, and multi monitor setups. With two Thunderbolt 4 output ports and two mini DisplayPort