Editing Synchronous dynamic random-access memory (section)

==== PC100 ====
{{For|the Japanese home computer|NEC PC-100}}
[[Image:SDRAM 128MB 133MHz.jpg|thumb|upright=1.25|DIMM: 168 pins and two notches]]
'''PC100''' is a standard for internal removable computer [[random-access memory]], defined by the [[Joint Electron Device Engineering Council|JEDEC]]. PC100 refers to Synchronous DRAM operating at a clock frequency of 100&nbsp;MHz, on a 64-bit-wide bus, at a voltage of 3.3&nbsp;V. PC100 is available in 168-pin [[DIMM]] and 144-pin [[SO-DIMM]] [[Computer form factor|form factor]]s. PC100 is [[backward compatible]] with PC66 and was superseded by the PC133 standard.

A module built out of 100&nbsp;MHz SDRAM chips is not necessarily capable of operating at 100&nbsp;MHz. The PC100 standard specifies the capabilities of the [[memory module]] as a whole. PC100 is used in many older computers; PCs around the late 1990s were the most common computers with PC100 memory.