Universal 4MB 30-Pin Parity 4pc set 16MB Total Memory 9 Chip SIMM IBM PC 386 486 AT XT MAC accessory

16 MB FPM Parity SIMM kit

This kit provides 16 MB of total memory across four 4 MB modules using 30-pin SIMM form factor with parity checking. It is designed for legacy systems such as 386 and 486 PCs plus compatible XT and Mac platforms. The 80 ns access speed matches period-correct timing requirements. Installers upgrading vintage workstations or restoring original configurations will find the kit a direct fit.

Sustained operation on vintage bus speeds

Each module runs at 80 ns fast-page-mode timing, delivering consistent throughput during extended DOS or early Windows sessions. The parity bit allows the motherboard to detect single-bit errors without halting the system. Because the chips are rated for the original bus cadence, thermal characteristics remain stable during long compilation runs or multi-hour gaming periods typical of the era. No additional cooling or voltage adjustment is required beyond stock board specifications.

Nine-chip layout and 30-pin connectors

Every module uses a nine-chip arrangement that implements the parity bit across the 30-pin edge connector. The pinout aligns with standard SIMM sockets found on 386, 486, AT and XT boards as well as contemporary Mac logic boards. The through-hole pins seat firmly in vertical or angled sockets, resisting vibration in desktop and tower chassis alike. Builders should verify that the target motherboard accepts 30-pin parity SIMMs before purchase, as some later boards require 72-pin or non-parity modules.