Basics SGRAM Video Memory - 52
SGRAM Video Memory
The iMac logic board comes with 2 MB of Synchronous
Graphic RAM (SGRAM) video memory soldered on. The logic
board also contains a video memory expansion slot that
accepts a Small Outline DIMM (SO-DIMM) to increase video
memory up to a maximum of 6 MB. Apple supports a 4 MB
SGRAM SO-DIMM that is 32-bit wide, 144-pin, fast-paged, 83
MHz/12 ns cycle time or faster.
Important:
Use only SGRAM SO-DIMMs. Never use the 256K
or 512K video memory DIMMs used in older Macintosh
computers.
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