Whether marked Quadra 630 DOS Compatible, LC 630 DOS Compatible, or Performa 631 or 640, these models have 4 MB of RAM soldered to the motherboard, two 72-pin SIMM sockets for memory expansion up to 52 MB, and usually a DOS Compatibility card as well.
Tag Archives: Performa 640
This relatively rare variant of the LC 630 includes a DOS card with an Intel 486DX2/66 CPU, although some shipped with a Cyrix 486/70. The DOS Compatibility card can share Mac motherboard memory or use its own dedicated RAM.
