Apple powermac 8500 series サービスマニュアル

 

 Basics

Dual In-Line Memory Modules (DIMMs) - 11

 

Dual In-Line Memory Modules 
(DIMMs)

 

The Power Macintosh 8200 Series, Power Macintosh 8500 

Series, and WS 8550 computers use DRAM Dual In-Line 

Memory Modules (DIMMs) instead of DRAM SIMMs. 

Whereas SIMMs have 72 pins, DIMMs have 168 pins. The 

extra pins provide a 64-bit data path, compared to a 32-bit 

data path for SIMMs. In addition, DIMMs do not have to be 

installed in pairs like the SIMMs on earlier Macintosh 

models. (However, to take advantage of memory 

interleaving, the DIMMs should be installed in paired slots. 

See "Memory Configurations" in Basics for more 

information.)

 

The Single In-Line Memory Modules (SIMMs) 

used in previous Macintosh models are 

 

 compatible with 

these computers.