The 4U expansion enclosure supports up to 32 PCIe x8 Gen3 cards in 4 hot-swappable cannisters, each containing up to 8 cards each. One to four servers can be connected to the enclosure each through a PCIe x16 cable. Each cannister is hot-swappable so the machine continues to operate when one is extracted. Each slot supports boards requiring up to 75W of power. Three 1200-watt hot-swappable power supplies provide 2400W of redundant power.