Saturday, November 24, 2007

Laptops and RAM

You need to increase the amount of RAM memory installed in the laptop computer. You need to identify the correct memory module for use in the computer.
How many pins does a typical module used for laptop computer RAM memory have?
1. >>144 -Correct
2. 168
3. 72
4. 240

Explanation : The correct type of memory module will have 144 pins. The module used for laptop RAM memory is Small Outline Dual Inline Memory Module (SO-DIMM). Current SO-DIMMs have 144 pins, 72 pins on either side of the module.

You might also see laptop memory in a 200-pin SO-DIMM module. This type of module is used for double data rate (DDR) memory, which provides faster memory access. 200-pin modules are used for the DDR1 (typically referred to as just DDR) and DDR2 standards.

You would not use a memory module with 72 pins. Memory with 72 pins is used in the Single Inline Memory Module (SIMM) format, which was used with desktop computers having 80486 and early Pentium processors.

You would not use a memory module with 168 pins. The Dual Inline Memory Module (DIMM) format with 168 pins, 84 pins on each side, is used with Pentium and Athlon desktop processors.

You would not use a memory module with 240 pins. DIMMs with 240 pins, 120 on either side, support 64-bit processors and 64-bit memory systems. They are used in desktop computers with 64-bit processors. These DIMMs use the DDR2 standard.
Objective: Laptops and Portable Devices