Sonnet xMac Pro Server PCIe Enclosure Rackmount, Black. My rock solid workhorse enclosure. I ran a 2013 Mac Pro 6,1 12-core with 3x Avid HDX PCIe cards in here with zero problems.
There is one small issue. The captive screws for the front panel USB connector were lost at some point, so new screws need to be installed if that connector is needed.
The connector itself is fine. Located in Berry Hill, Tennessee. Also listed on local websites. Provides PCIe Card Expansion for Mac Pro-Use high-performance PCIe cards with the latest Mac Pro.
Makes Your Mac Pro Road-Ready-4U rackmount enclosure securely holds the computer and PCIe cards in place, adding mobility to your Mac. Three PCIe Slots-Supports three full-length, full-height, single-width cards, or one double-width card plus one single-width card. Thunderbolt 2 Interface-Maximum performance with Mac Pro; backward compatible with devices equipped with 10Gbps Thunderbolt technology.
Improved Design-New captive thumbscrews and two faceplates enable easier computer and PCIe card installation, and simpler cable access. Provides Space for Additional Devices-If you have one of Sonnet's optional Mobile Rack Device Mounting Kits, you can install HDDs, SSDs, a tape or optical drive, and more inside xMac Pro Server's enclosure.