https://www.tomshardware.com/reviews/turbobox-na255a-pci-express,3430-4.html
Results: General-Purpose GPU - External Graphics Over PCIe 3.0? Netstor's NA255A, Reviewed | Tom's...
Mar 29, 2013 - Netstor sent over its TurboBox NA255A, an external enclosure capable of accommodating four dual-slot graphics cards across one 16-lane PCI Express 3.0...