Chapter 6 A+ Memory

RAM (Random Access Memory)

RAM (Random Access Memory)

The main type of memory found on the motherboard.

DRAM (Dynamic Ram)

Less expensive but slower than SRAM.

Leaks Out

With DRAM, the 1s and 0s must be refreshed over time. As a result, the charge, which represents information...

SRAM

A small amount of what ram can be found inside the processor?

Cache Memory

SRAM is also known as...

DRAM

Cache Memory holds the most frequently used data so the CPU does not return to slower... To obtain data.

SODIMM (Small Outline DIMM)

Laptops and printers use a smaller DIMM called a...

DDR3

Uses 240-pin DIMMS and is not compatible with DDR2 or DDR.

DDR4

Operates at a lower voltage and faster speeds than DDR3 modules. Uses 288-pin DIMMs.

DDR5

Operates at an even lower voltage and even faster than DDR4. Uses 288-pins.

Heat spreader.

A metal casing commonly on the outside of the memory module.

Non-parity

Chips that do not use any error checking.

Error Correction Code (ECC)

USes a mathematical algorithm to verify data accuracy.

Unbuffered Memory

Memory in which data is sent immediately through the memory chip.

Buffered Memory.

A memory Module that has extra chips (registers) near the bottom of the module that delay all data transfers to ensure accuracy in servers and high-end computers.

SPD (Serial Presence detect)

A module that has an extra EEPROM that holds information about the DIMM.

Dual-Channel

Handles the processing of memory requests better by handling two memory paths simultaneously.

Match

Dual channeling can increase a systems performance but only if the memory modules...

CL Rating

The amount of time that passes before the processor moves on to the next memory address.

Virtual Ram

Involves using hard drive space as if it were RAM.

Paging File

A block of hard drive space that applications use like RAM.

Performance Utility

A tab available in task manager for monitoring memory usage.

Compatibility Mode

An application/Mode available to run programs that might be older.

Virtual Machine

Allows you to reduce hardware costs by running multiple operating systems simultaneously on a single computer.

Flash memory.

A type of nonvolatile, solid-state memory that holds data even when the computer is off.

Memory Cards

Contain flash memory and are used in cell phones, digital recorders, cameras, and any mobile device.