Blackmagic Design BDLKULSR4KEXTSPK PCIe Cable Kit for UltraStudio 4K Extreme Connect your UltraStudio 4K Extreme to your computer via PCIe using the PCIe Cable Kit from Blackmagic Design. The kit includes a high-speed Gen 3 PCI express plug-in card and cable, and delivers higher data transfer speeds than Thunderbolt. The PCIe adapter card needs to be installed in your computer’s PCIe slot and the cable connects your UltraStudio 4K Extreme’s PCIe port to the PCIe port at the back of your computer.