Magma ExpressBox 3T-V3 with Mac Pro Rackmount Kit(3) Slot Thunderbolt? 3 PCIe ExpansionExpressBox 3T-V3 provides an ?outside-the-box? solution for using PCIe cards with Thunderbolt? 3-equipped computers. High-performance work flows are possible by connecting a Thunderbolt 3-equipped computer to a Thunderbolt? 3 expansion chassis containing PCIe cards such as video capture, media transcoding, audio processing, and fast data storage. And because Thunderbolt? 3 is also based on DisplayPort technology, you can daisy chain a high-resolution display with your Magma ExpressBox 3T-V3Benefits:Supports (3) full-length PCI Express cardsAttach PCIe cards to Thunderbolt? 3-enabled computerExtension of PCI Express signals outside the computerDaisy-chain or end-point deviceThunderbolt? 3 features speeds up to 40GbpsFeatures:Easy Plug and Play installationUse any combination of x1, x4, x8 and x16 PCIe cardsHot-swappable cooling fanWorks with Mac OS X 10.6.8 or higher and Windows 7 and 8Additional blower for extra hot cards300W power supply with (2) auxiliary power connectors