personal computer by Apple

The LC 550 replaced the LC 520 , increasing CPU speed from 25 MHz to 33 MHz. It was released at the same time as the 68LC040-based LC 575 .

The Performa/LC 550 uses the same motherboard as the relatively rare Colour Classic II . For those with original Color Classics , dropping in a 550 motherboard is the quickest, easiest performance upgrade known.

Specs (via Low End Mac)

• Cpu: 33 MHz 68030
• Fpu: 68882 (optional)
• Performance: 4.6 (relative to SE); 2.86, MacBench 2.0 CPU; 8.3 MIPS
• Ram: 4 MB on motherboard, expandable to 36 MB using a single 80ns 72-pin SIMM; can use 1 MB, 2 MB, 4 MB, 8 MB, 16 MB, or 32 MB SIMM
• Rom: 1 MB
• L2 Cache: none
• Hard Drive: 160 MB
• Video: 512 KB VRAM, supports 640 x 480 at 8-bits
• Addressing: 24-bit or 32-bit
• Gestalt Id: 80
• Upgrade Path: LC 575 or LC 475/Quadra 605 motherboard, Power Mac PDS card
• Adb: 2 ports for keyboard and mouse
• Scsi: DB-25 connector on back of computer
• Serial: 2 DIN-8 RS-422 ports on back of computer
• Pram Battery: 3.6V half-AA
• Weight: 40.5 lbs.
• See: Online resources and links for the Mac LC 550 (Performa 550)