LC 550 and LC 575
a.k.a. Performa 550 and Performa 575
The LC 550 and 575 have 4 MB of RAM soldered to the motherboard and a single 72-pin SIMM socket for memory expansion.
With the edge connector facing away from you, you will see a SIMM socket near the far left edge of the motherboard, running from the front of the computer to the rear. This can be filled with a 1 MB, 2 MB, 4 MB, 8 MB, 16 MB, or 32 MB SIMM. The 72-pin SIMM must be 80ns or faster.
To add memory, simply put the new SIMM in the RAM socket.
VRAM
The 550 ships with 512 KB of soldered VRAM. You can upgrade this to 1 MB by adding one 512 KB VRAM SIMMs to the single VRAM socket.
The 575 ships with 512 KB VRAM composed of two 256 KB VRAM SIMMs. These can be removed and replaced with a pair of 512 KB VRAM SIMMs.
<go to memory upgrade index, LC 550, or LC 575 page>
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