Memory Technology

Question 1

random access memory

Answer 1

hold data and instructions used by the cpu

Question 2

DRAM

Answer 2

dynamic ram- memory modules used on motherboard

Question 3

Variations of DRAM

Answer 3

DIMM- dual inline memory module. small outline DIMM (SO-DIMM)-Laptops. microDIMMS- subnotebook comps. RIMM + SIMM (outdated)

Question 4

Diiference between DRAMs

Answer 4

-data path width each module accommodates. -how data moves from system bus to module

Question 5

types memory modules

Answer 5

288 pin ddr4- fastest dimm, low voltage, can support quad, dual, and single dimm. 240 pin ddr3- supports quad, triple, dual, single dimm. 240p ddr2. supports dual channel or function as single. 184p ddr supports dual or fuctions as single dimm 168p sdram. RIMM 184 pin-

Question 6

DIMM details

Answer 6

64-bit data path. independent pins on opposite sides of the module. older DIMMs- doesnt not perform simultaneously with others. synchronous DRAM- runs syncroniusly with system bus. 2 notches, 168 pins

Question 7

What is the typical access time for a register?

Answer 7

1 nanosecond

Question 8

What is the typical access time for a cache?

Answer 8

2 nanoseconds

Question 9

What is the typical access time for main memory?

Answer 9

10 nanoseconds

Question 10

What is the typical access time for magnetic disk?

Answer 10

10 milliseconds

Question 11

What is the typical access time for magnetic tape?

Answer 11

100 seconds

Question 12

What is the capacity of a register?

Answer 12

<1kb

Question 13

What is the capacity of main memory?

Answer 13

64-512mb

Question 14

What is the capacity of a cache?

Answer 14

1mb

Question 15

What is the capacity of a magnetic disk?

Answer 15

5-50gb

Question 16

What is the capacity of a magnetic tape?

Answer 16

20-100gb

Question 17

SDRAM

Answer 17

Synchronous Dynamic Random Access Memory Runs synchronously with system bus Two notches Uses 168 pins

Question 18

DIMM has ____ ____ on opposite sides of module

Answer 18

independent pins

Question 19

Double Data Rate

Answer 19

also called ddr sdram- two times faster than sdram. ddr2 sdram- faster uses less power. ddr3 sdam- faster ddr2, uses less power. ddr2 and 3- 240 pin-not compatable uses different notches

Question 20

DDR

Answer 20

Double Data Rate Twice as fast

Question 21

What factors effect the performance, capacity, and features of DIMMs?

Answer 21

Number of channels they use How much RAM is on one DIMM Speed Error checking abilities Buffering

Question 22

DDR3

Answer 22

Twice as fast as DDR2, uses less power

Question 23

What does dual channel memory control do?

Answer 23

Memory controller communicates with two DIMMs at the same time Doubles memory access speed

Question 24

factors affect capacity, features and performance of DIMMs

Answer 24

number of channels they used. how much ram is on one dimm. speed, error detection, buffering

Question 25

quad channeling

Answer 25

introduced with intel sandy brings chipset and processor. introduced 8 memory slots

Question 26

setting up for dual channeling

Answer 26

pair of dimms in channel must be equally matched: eg speed, size, manufacturers and features

Question 27

setting up for triple dimm channeling

Answer 27

3 DIMM slots populated witg 3 matching ddr3 dimms. 4th is empty

Question 28

What DIMMs use dual channels?

Answer 28

DDR, DDR2, DDR3 DDR3 also uses triple channel

Question 29

What does dual channel memory control do?

Answer 29

Memory controller communicates with two DIMMs at the same time Doubles memory access speed

Question 30

What did the Intel Sandy Bridge chipset and processor introduce?

Answer 30

Quad channelling using 8 memory slots The processor can access 4 slots at a time

Question 31

How do you set up dual/triple channeling?

Answer 31

Your pair (or set of 3) DIMMs in a channel must be identical in size, speed, and features (it also helps if they're the same manufacturer).

Question 32

What is DIMM speed measured in?

Answer 32

MHz and PC Rating

Question 33

What are the PC Ratings?

Answer 33

Total bandwidth between module and CPU: DDR2 usually PC2 DDR3 usually PC3 DDR4 usually PC4

Question 34

What are the steps to installing a DIMM?

Answer 34

Pull out supporting arms on the sides of the slot Use notches on DIMM edge connector as a guide Insert DIMM straight down into the slot Ensure supporting arms lock into position

Question 35

If new memory is not recognized try \_\_\_\_\_\_\_

Answer 35

Resetting the module

Question 36

What happens if you mix buffered memory with unbuffered memory?

Answer 36

It won't work lol

Question 37

Installing DIMM: Motherboard using DDR3 dual channel DIMMs

Answer 37

Install matching DIMMs in 2 blue slots Install matching DIMMs in 2 black slots

Question 38

Installing DIMM: Motherboard using DDR3 triple channel DIMMs

Answer 38

Install matching DIMMs in 3 blue slots If 4th spot is populated it reverts to single channelling For dual channeling, install 2 matching DIMMs in blue spots furthest away from processor

Question 39

What are the minimum and maximum RAM requirements for Windows 7/8?

Answer 39

Minimum RAM is 2GB Windows 7 64 bit max RAM 16GB Windows 8 64 bit max RAM 128GB

Question 40

What do you have to consider when looking at purchasing memory?

Answer 40

Total RAM installed Memory technology used Speed of memory in MHz, PC rating, or ns ECC or non-ECC CL or RL rating Single, dual, triple or quad channeling

Question 41

What are the connectors inside memory slots made of?

Answer 41

Tin or gold

Question 42

What types of memory are used in laptops?

Answer 42

DDR, DDR3L, DDR3, DDR4, or DDR2 SO-DIMM

Question 43

CAS and RAS

Answer 43

Column Access Strobe Row Access Strobe

Question 44

What are column access strobe (CAS) and row access strobe (RAS)?

Answer 44

The number of clock cycles it takes to write or read a column or row of data off a memory module. CAS is more common.

Question 45

Fastest memory with lowest voltage requirements?

Answer 45

288-pin DDR4 DIMM Here, have a chart: