Storage devices Flashcards
Short term memory of you computer
RAM
RAM stands for
Random Access Memory
What is the function of RAM
Temporary holds operating system and program files that user is using. this makes it easier for CPU to retrieve specific files working on instead of looking through overcrowded hard drive
Can RAM stores data
Cannot store data. Data is lost as soon as computer is turned off
What are the form factors of RAM
The two form factors of RAM are DIMM and SO-DIMM
What is DIMM stands for
Dual in-line Memory Module
What is SO-DIMM stands for
Small outline Dual In-line Memory Module
Which RAM form factor is found on desktops and servers
DIMM
SO-DIMM is found in which type of computer
SO-DIMM is found in laptops and other small form factor computers
Is SO-DIMM and DIMM Ram interchangable
SO-DIMM and DIMM RAM are not interchangable. One will not fit into the slot of the other DIMM slot.
DDR stands for
Double Data Rate
What is meant by double data rate
means that two transfers of data happen per clock cycle.
What is the newest DDR
DDR4
the number after the DDR / PC before the hyphen refers to what?
The number after the DDR or the PC represents the generation of the RAM. EX: DDR4 / PC4 = 4th generation
A number after the DDR and Hyphen refers to.
EX: DDR-1600 (16,00)
The number that comes after the DDR and Hyphen refers to the mega transfer speed per-sec (MT/s) . EX: DDR-1600 RAM operates at 1,600 Megatransfer speed per-second.
What is meant by bandwidth
Bandwidth - refers to volume of data that can be transmitted over a given path in a measured amount of time. bandwidth does not refer to speed. It refers to volume
It is the maximum amount of total data volume (Rate) that can be transfered across a given path at a given amount of time.
The “PC” after DDR label means what
The ‘PC” after the DDR stands for the Bandwith per-second.
interpret this DDR Label - DDR3-PC3-1,800
Double Data Rate 3rd generation - bandwith of 3rd generation that has a transfer rate of 1,800 megabyte per-seond
Bandwith is measured in Megatransfer speed or Megabyte
Bandwith (PC3) is measures in megabyte
How Can you overclock RAM
RAM can be overclocked by increasing the bandwith of
How can we find-out the total data rate (Bandwidth) of a RAM module
To find-out the total data rate of a RAM module, we multiply the frequency of transfer speed by 8.
EX: 300 * 8 = 2400MB/s
Interpret this label: DDR-1,600
Double Data Rate has a transfer speed of 1,600.
what is the total data Rate of DDR-1,600
multiply the transfer speed by 8 = 1,600 * 8
What is the difference between data rate and transfer speed/frequency
Data Rate is the amount of data that can travel across a given bandwith. It is expressed as PC3-… transfer speed or frequency measures how fast the data can be transfered. It does not have any letters infornt of the number.
What is meant by RAM Timing and latency response
RAM timing and latency response measures how fast RAM can respond to request in nanoseconds. The lower the number, the faster the response rate.
what is CAS stands for
Column Address Strobe
What is CAS latency
CAS Latency is the delay in clock cycles between the READ command and the moment data is available
Is a higher CAS latency better than alower Number
The lower CAS means that the delay in clock cycle is less. therefore, the lower number is better
Is RAM capacity more important than CAS Latency
Capacity is better than latency since larger RAM capacity will be able to hold more temporary data
