Chapter 4: RAM Flashcards
How does DRAM Function?
Like an electronic spreadsheet filled with rows and columns that are made up of 1s and 0s
How would you refer to RAM that has 8 bit wide data or 16 bit wide data
x8 and x16
What solved the problem of DRAM taking up too much space on the motherboard?
DIMM sticks also older ones are SIMM
What sizes do modern DRAM sticks come in?
x32 and x64
What is SDRAM and what stick did it come with
Synchronous Dynamic Random Access Memory syncs up with the system clock, Dual inline memory module
What is SODIMM
Small Outline Dual Inline Memory Module
What is the nomenclature for SDRAM that is tied to a 100Mhz frontside bus?
PC100 or higher
What is RDRAM
Rambus Dynamic Random Access Memory developed by a company for the Pentium chip. a bit faster
What is DDR SDRAM
Double data rate was able to send 2 request for every tick of the clock.
What is the clock speed in relation to the DDR speed in relation to the PC rated speed
The DDR rating is double the clock and the PC rating is 8 times the DDR rating
What changed from DDR to DDR2 RAM?
How is it measured?
The I/O speeds doubled. The ram speed stayed the same but DDR2 doubles the speed from DDR
x2 x2 x8
What changed from DDR2 to DDR3?
How is it measured?
The RAM buffer was doubled from 4MB to 8MB doubling the speed yet again also supports up to 16GB memory modules supporting more ram overall
x4 x2 x8
What speed rating does DDR4 use that is different from the bit rate speed of old?
Megatransfers/second
What changed from DDR3 to DDR4
How is it measured?
Faster overall and supports theoretically 512GB modules. take the clock speed and multiply by 8 to get the megatransfers/second then multiply that by 8 to get the PC rating
x8 (to get MT/s and DDR rating) x8 (get PC rating)
How many pins on DDR2 stick?
SODIMM?
240
200
