The Acorn System 5 was the final Acorn rack-mounted system, released in 1983. It was mounted in an extra-height single 19" frame, which could accommodate two vertically mounted 5" floppy drives, with either seven or ten Eurocard slots. It came complete with a power supply, and was only available fully assembled. As standard it had a 1 MHz 6502, 32K DRAM, a disk controller, and either the 80x25 or the Teletext 40x25 VDU cards. Customers could choose which cards to install in the remaining slots, including interface cards, an additional 16K DRAM card, and/or an Econet network adapter; they could also choose to upgrade the processor board to a faster 2 MHz 6502 board.