A+ 1001: RAM

Question 1

Different Kinds of RAM

Answer 1

1. SDRAM

2. DDR SDRAM

Question 2

SDRAM

Answer 2

Synchronized Dynamic Random Access Memory

Synchronized to the system crystal

Runs at the speed of the motherboard

has two notches

Question 3

DDR SDRAM

Answer 3

Double Data Rate Synchronous Dynamic Random Access Memory

Provides two bits of information for every one tick of the clock, which sped up RAM

Question 4

DDR Ram Speed Rating

Answer 4

DDR

Double the pc ClockSpeed

Multiply by 8 to get the PC speed.

100Mhz - DDR-200 PC-1600

DDR2

For DDR2 you double the DDR speed

DDR3

Multiply Core Clock Speed by 4 to get DDR I/O Speed

the Double the I/O Speed to get DDR3 Speed

Then Multiply by 8 to get PC3 Speed

DDR4

The DDR4 speed is the same as the Bandwidth’s MT/s (Mega transfers per second)

Question 5

DDR2

Answer 5

Next generation of DDR RAM, Doubles in Speed from DDR

240 pin

Question 6

DDR3

Answer 6

Next generation of DDR RAM, Doubles in Speed from DDR2

240 pin

Question 7

DDR4

Answer 7

Next generation of DDR RAM, Doubles in Speed from DDR3

288 pin

Question 8

What units are used to measure RAM speed?

Answer 8

DDR Speed or PC Speed

Question 9

Double Sided RAM

Answer 9

RAM Chips on both sides of stick

Some motherboards have problems with double-sided ram sticks

Question 10

Duel Channel Memory

Answer 10

Requires two ram sticks of the exact same size, capacity and speed

Most of the time it won’t boot with one stick

Question 11

Parity/ ECC RAM

Answer 11

ECC Error Correction Code RAM chips has an unequal or odd amount of chips

It has an extra chip called the parity chip

Can have 2 of the ohter 8 chips be bad and still function

Only fits on motherboards that are designed ot use it

It is expensive

Mostly used in servers

Question 12

SO-DIMM

Answer 12

They are shorter

commonly used in Laptops

Question 13

SPD Chip

Answer 13

Serial Presence Detection Chip

Built into every ram stick

Allows the system to query ram chip to discover make, model, capacity etc.

Question 14

Installing RAM

Answer 14

1. Consult Motherboard Manual for max capacity, Speed, and channels
2. Ensure notches line up
3. Drop in and push
4. Close latches
5. Bootup system to check if system recognizes ram

Question 15

DDR4 RAM modules have how many pins?

Answer 15

288 Pins

Question 16

Which type of RAM modules have 240 pins?

Answer 16

DDR3

Question 17

Which technology makes simultaneous access to multiple RAM modules?

Answer 17

Dual channel memory provides simultaneous access to two RAM modules when reading or writing.

Synchronous RAM is technology that keeps RAM timing matched to the system clock.

Single and double-sided RAM modules are configurations that determine the capacity of RAM modules.

Question 18

Which RAM would typically be installed into a laptop computer?

Answer 18

SO-DIMMS

Question 19

What types of RAM can function even if one of the memory chips fail?

Answer 19

ECC RAM and Parity RAM can function with a failed memory chip.

Question 20

In what order should memory slots be populated?

Answer 20

Memory slots should be populated according to the instructions in the motherboard manual