Chp 4 RAM

Question 1

RAM

Answer 1

Random Access Memory
Stores data currently being used
Loses data if power is lost

Question 2

DRAM

Answer 2

Dynamic RAM

Requires frequent recharges of memory to retain its contents

Question 3

SRAM

Answer 3

Static RAM
Does not need to be periodically refreshed
Used as cache memory in the CPU
used as temporary storage in LCD screens

Question 4

SDRAM
Pin Count
Bus Speed

Answer 4

Synchronous DRAM
The first kind of RAM to run in sync with the processor
uses 168 pin DIMM modules
Speed is rated by bus speed
PC 66 - 66MHz
PC 100 - 100MHz
PC 133 - 133MHz

Question 5

DDR SDRAM
Pin Count
Bus Speed

Answer 5

Double Data Rate SDRAM
184 Pin
Bus Speeds
PC 1600
PC 2100
PC 2700
PC 3200

Question 6

DDR 2 SDRAM
Pin Count
Bus Speed

Answer 6

Double Data Rate 2 SDRAM
240 Pin
Twice as fast as DDR but higher latency
Speeds
PC2 3200
PC2 5300
PC2 6400
PC2 8500

Question 7

DDR 3 SDRAM
Pin Count
Bus Speed

Answer 7

Double Data Rate 3 SDRAM
240 Pin
Runs at a lower voltage
Mostly runs at faster speeds
Higher latency than DDR 2
PC3 8500
PC3 17000
PC3 1280

Question 8

Parity Checking

Answer 8

The process that ensures accurate data transmission between nodes during communication.

Question 9

ECC

Answer 9

Error-Correcting Code

A type of memory that enables systems to correct single-bit errors and notify you of larger errors.

Question 10

Buffered (Registered) Memory

Answer 10

Memory modules that contain a register chip that enables the system to remain stable with large amounts of memory installed

Question 11

DIMM

Answer 11

Dual Inline Memory Module

Question 12

SO DIMM

Answer 12

Small Outline DIMM

Smaller DIMM for laptops

Question 13

Multi Channel

Answer 13

Systems that are designed to access two or more identical modules as a single logical unit.