72 Pin SIMM
The 72 Pin SIMM was the second generation of the SIMM family.
They are typically found in the Intel 486, 486DX, 586 and some early Pentium desktop computer systems. They come in both 32 bit and 36 bit (parity) configurations, with memory ranges of 4, 8, 16 and 32 megabytes. These were normally produced in two voltage, 5V and 3.3V, and theirs speeds ranged from 60ns to 70ns.
Both Fast Page Mode (FPM) and Extended Data Out (EDO) were standard DRAM types offered in 72 pin configurations. Dram chip packaging consisted of DIP, PLCC and SOJ packages.