3.3 Install RAM types

Question 1

SODIMM (Small Outline Dual Inline Memory Modules) are commonly found in ___.

Answer 1

laptops

Question 2

DDR2, DDR3, DDR4 (Double data rate) memory comes in both ___ and ___ form factors.

Answer 2

DIMM, SODIMM

Question 3

A single channel RAM architecture moves data on a single data bus, typically ___ at a time.

Answer 3

64-bits

Question 4

A dual channel RAM architecture moves data on two data buses, typically ___ at a time.

Answer 4

128-bits

Question 5

A triple channel RAM architecture moves data on three data buses, typically ___ at a time.

Answer 5

192-bits

Question 6

___ memory has logic built in to detect and correct single-bit memory errors.

Answer 6

Error Checking and Correcting (ECC)

Question 7

What is the limitation of ECC memory?

Answer 7

It cannot correct an error in any byte with more than one bad bit.

Question 8

What is the difference between ECC memory and memory with only parity?

Answer 8

Parity only detects errors and cannot correct them like ECC.

Question 9

When programs or data are in use, they’re moved off of your (1)___ and they’re put into (2)___ so it can perform calculations on that information, then store that information back on the (1)___ when you’re finished.

Answer 9

(1) SSD/hard drive

(2) RAM

Question 10

DIMM is what?

Answer 10

Dual inline memory module it has 64 bit data width, so we’re able to transfer data from these memory modules in chunks of 64 bits at a time. Has two or three electrical contacts separated by a small gap called a key.

Question 11

DIMM uses what type of memory?

Answer 11

Dynamic random access (DRAM)

Question 12

What do the “D” and “R” in DRAM connotate?

Answer 12

Dynamic means the data must constantly be refreshed in order for it to be maintained. Random means any data on it can be accessed in any order without rewinding.

Question 13

The type of dynamic random access memory that you would find on today’s computers is a type called ____ dynamic random access memory. What does this mean?

Answer 13

Synchronous (SDRAM). It’s synchronous with the common system clock of the computer

Question 14

DDR2 is both backwards and forward compatible with DDR and DDR3.

True or False?

Answer 14

False. DDR isn’t forward or backwards compatible, needs exactly a DDR2 bus to run DDR2. DDR3 for a DDR3 slot, etc.

Question 15

What is the maximum memory capacity per DIMM for DDR4 SDRAM?

(hint: x4 DDR3)

Answer 15

64GB

Question 16

What is the maximum memory capacity per DIMM for DDR3 SDRAM?

Answer 16

16GB

Question 17

If a memory module wont fit perfectly, it may be because…

Answer 17

You have the wrong type of memory, the key is in the wrong spot.

Question 18

This use of multiple modules to increase computer performance is called ____.

Answer 18

multi-channel memory

Question 19

When you’re deciding the types of memory modules to use in a dual channel, triple channel, or quad channel system, you want to be sure all of those memory modules are all ___.

Answer 19

Identical. You don’t want to use different sizes or different performance specifications. They should all match perfectly.

Question 20

Memory that checks itself for errors (parity/ECC memory) is often used for what kinds of devices?

Answer 20

Critical computer systems; VM servers, database servers, any kind of server

Question 21

If motherboard requires ECC modules, can it also use parity modules?

Answer 21

No, it must use exclusively ECC.