Memory Modules

Early computers had RAM installed on the motherboard as individual chips. These individual memory chips, called dual inline package (DIP) chips, were difficult to install and often became loose on the motherboard. To solve this problem, designers soldered the memory chips on a special circuit board called a memory module. The different types of memory modules are as follows:

■ Dual Inline Package (DIP) is an individual memory chip. A DIP had dual rows of pins used to attach it to the motherboard.

■ Single Inline Memory Module (SIMM) is a small circuit board that holds several memory chips. SIMMs have 30-pin and 72-pin configurations.

■ Dual Inline Memory Module (DIMM) is a circuit board that holds SDRAM, DDR SDRAM, and DDR2 SDRAM chips. There are 168-pin SDRAM DIMMs, 184-pin DDR DIMMs, and 240-pin DDR2 DIMMs.

■ RAM Bus Inline Memory Module (RIMM) is a circuit board that holds RDRAM chips. A typical RIMM has a 184-pin configuration.

Note

Memory modules can be single-sided or double-sided. Single-sided memory modules contain RAM on only one side of the module. Double-sided memory modules contain RAM on both sides of the module.

Continue reading here: Identify the Names Purposes and Characteristics of Adapter Cards

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