Single In Line Memory Module - 30 pins

SIMM-30 was the first memory module to obtain commercial success, developed over an old memory module type called SIPP. SIMM-30 modules are 8-bit modules and use FPM (Fast Page Mode) memory chips

Since it is an 8-bit module, its installation must be made like the following:

• 286 and 386SX: Two in two, since the CPU accesses the memory using 16 bits.
• 386DX, 486 and 5x86: Four in four, since the CPU accesses the memory using 32 bits.

This module was used up to 486 times, being gradually replaced by SIMM-72 memory module.

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Figure 1: SIMM-30 memory module.

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Figure 2: Motherboard with both SIMM-30 and SIMM-72 sockets.

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