Original model with 512 kB RAM, external power supply, no floppy disk drive.

The $3,495 revised model also included 256 KB RAM as a standard configuration.

External 32 kB RAM packs that mounted in the rear expansion slot were also available from third parties.

Amiga 501 with 512 kB RAM and real-time clock.

Memory: 256 kB RAM expandable to 768 kB on board.

The CPC664 features 64 kB RAM and an internal 3-inch floppy disk drive.

The CPC6128 features 128 kB RAM and an internal 3-inch floppy disc drive.

There was "Pro" variant with 512 kB RAM.

A computer with 128 KB RAM and a 10-megabyte (Mb) hard drive could run as many as five concurrent users.

They could also be extended with "high" resolution graphics (240 x 240 pixels, 2 bpp) using 16 kB RAM as video memory.