The xMac Studio 3U Rackmount System with Echo II DV T5 Module houses a Mac Studio inside a 3RU enclosure and adds Thunderbolt 5 PCIe expansion the Mac Studio doesn't have on its own. Dual PCIe 4.0 x16 slots take two full-height, full-length PCIe cards at once, each connected over its own Thunderbolt 5 port and included Thunderbolt 5 cable. Because each slot runs its own Thunderbolt 5 controller, every installed card gets up to 6000 MB/s of dedicated bandwidth rather than sharing that figure with the other slot -- a distinction that matters for bandwidth-hungry, non-GPU I/O cards such as DV I/O capture cards, NVMe SSD storage and multiport 25Gb Ethernet adapters. An integrated 400W power supply with dual 75W auxiliary connectors handles demanding cards, and dual cooling fans keep the enclosure running under sustained load.