lesson 4 memory

Question 1

what is rams main function

Answer 1

the Main memory that the CPU uses to store or receive data

Question 2

a type of memory that loses its content without power

Answer 2

volatile memory

Question 3

ROM

Answer 3

Read only memory not volatile

Question 4

allows the ram to communicate with the cpu

Answer 4

memory controller

Question 5

a type of memory thaT is very fast and typically used in the Cpu cache

Answer 5

SRAM

Question 6

Syncs to base clock of mobo (system bus speed)

And needs to be periodically refreshed

Answer 6

synchronous dynamic RAM- 166PIN

Question 7

a memory chip that is used as main memory. DRAM must be constantly refreshed with pulses of electricity in order to maintain the data stored within the chip

Answer 7

DRAM

Question 8

Double Data Rate SDRAM is memory that transfers data twice as fast as SDRAM. DDR SDRAM increases performance by transferring data twice per clock cycle.

Answer 8

DDR 184 PIN-2.5 VOLTS

Question 9

Double Data Rate 2 SDRAM is faster than DDR-SDRAM memory. DDR2 SDRAM improves performance over DDR SDRAM by decreasing noise and crosstalk between the signal wires.

Answer 9

DDR2 = 240 PINS 1.8 VOLTS

Question 10

Double Data Rate 3 SDRAM expands memory bandwidth by doubling the clock rate of DDR2 SDRAM. DDR3 SDRAM consumes less power and generates less heat than DDR2 SDRAM.

Answer 10

DDR3 - 240 PINS 1.2-1.5 VOLTS

Question 11

Double Data Rate 4 SDRAM quadruples DDR3 maximum storage capacity, requires 40% less power due to it using a lower voltage and has advanced error correction features.

Answer 11

DDR4 -280 PINS 1.2-1.35 VOLTS

Question 12

single channel architecture

Answer 12

Original RAM architecture. 64-bit bus (or data channel) between the memory and
the memory controller. One or more sticks of RAM can be installed on the motherboard but they
share the same channel.

Question 13

dual channel architecture

Answer 13

Doubles the data. Two 64-bit channels are employed together resulting in a 128-bit
bus.

Question 14

single sided memory module

Answer 14

Single modules with a single bank of chips. Memory module could have chips on
both physical sides or only on one side - It is known as single sided because the computer can address all the
chips at once.

Question 15

dual sided memory module

Answer 15

Memory modules have their chips divided into two “sides” known as banks. Only
one side can be seen by the computer at once

Question 16

When memory stores an extra bit (parity bit) used for error detection. So mem module can store 9
bits instead of 8 bits for every byte of data. Required for data integrity.

Answer 16

RAM parity

Question 17

non parity ram

Answer 17

Nonparity memory does not check for errors in memory.

Question 18

Error Correction Code in RAM - Can detect and correct errors. Additional information needs to be stored, and
more resources are used. Slowest type of RAM and most expensive. Usually identified with an E. I.e. PC3-10600E

Answer 18

ECC RAM

Question 19

Happens when a memory controller tries to access data from a memory module. Slight delay
(measured in nanoseconds)

Answer 19

memory latency

Question 20

always hold ram by the

Answer 20

Edges and employ anti-static measures

Question 21

unbuffered memory

Answer 21

memory commands in unbuffered memory configurations go directly from the controller to the memory module

Question 22

buffered memory

Answer 22

Registered memory has a “register” that resides between the RAM and the system’s memory controller which lessens the load that is placed on the memory controller itself

Question 23

data transfer rate

Answer 23

MT/s (megatransfers/second) x 8 = Data Transfer Rate

Question 24

ram typically used in laptops

Answer 24

SO-DIMM small outline dimm

Question 25

Dual inline memory module

Answer 25

DIMM

Question 26

DDR2 and DDR3 SO-DIMMS have how many pins

Answer 26

200 and 204

Question 27

DDR4 SO-DIMMS have how many pins

Answer 27

260

Question 28

ram speed is measured in what

Answer 28

mhz