Mac LC and Mac LC II

a.k.a. Performa 400-430

The Mac LC has 2 MB of RAM soldered to the motherboard; the LC II has 2 MB or 4 MB.

With the rear of the computer away from you, you will see two SIMM sockets on the right side of the motherboard. These can be filled with 1 MB, 2 MB, or 4 MB SIMMs. SIMMs must be 100ns or faster and of the 30-pin variety.

To add 2 MB, insert 1 MB SIMMs in each socket.

To add 4 MB, install 2 MB SIMMs in the SIMM sockets.

To add 8 MB, put 4 MB SIMMs in the memory slots. Note that an LC II with 4 MB on the motherboard will only see 10 MB with this upgrade. This is a peculiarity of the computer's design and not a problem with RAM.

VRAM

The LC and LC II ship with 256 KB VRAM. You can upgrade this to 512 KB by replacing the old SIMM with a 512 KB VRAM SIMM, 100ns or faster.

Recommendation

If you have less than 10 MB installed, upgrade to 10 MB.

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