types of ram
TRANSCRIPT
Types of RAM
• There are three types of RAM :
DRAM • Dynamic Random Access memory
SRAM • Static Random Access memory
MRAM• Magnetoresistive
Random Access memory
RAM
Dynamic Random Access memory
Dynamic Random Access Memory
Has memory cells with a paired transistor & capacitor.
Each bit data is store in separate capacitor .
Dynamic Random Access Memory
Capacitor may be charged or uncharged.
Charging & discharging represent the two values of data (0,1)
Dynamic Random Access Memory
Types are:
Static Random Access Memory
Static Random Access Memory
Uses multiple transistors for cell.
Doesn't have a capacitor in each cell.
It is made up of flip flop circuit.
It use voltage to store data.
Static Random Access Memory
Each SRAM is made of six transistors.
Each bit in an SRAM is stored on four transistor or more.
Types are:
Static Random Access Memory
Static vs Dynamic
Magneto resistive Random Access memory
Magnetoresistive Random Access memory
Stores data using magnetic charges instead of electrical charges.
Greater storage capacity.
Consumes less power.
Faster access times than electronic RAM.
MRAM retains its contents after power is removed from the computer.
Magnetoresistive Random Access memory
DDR SDRAMDDR3 DDR4
SDRAM – 66Mhz, 100Mhz, 133Mhz DDR1 – 266Mhz, 333Mhz, 400Mhz DDR2 – 400Mhz, 533Mhz, 677Mhz, 800Mhz DDR3 – 400Mhz, 533Mhz, 677Mhz, 800Mhz, 933Mhz, 1066Mhz DDR4 – 1600Mhz, 1866Mhz, 2133Mhz, 2400Mhz, 2666Mhz, 3200Mhz, 4266Mhz
JEDEC Solid State Technology AssociationJoint Electron Device Engineering Council
1.5 or 1.65 v 800 and 2400
16 Gb
1.2 v1600 and 3200
128 Gb
Types of DRAM
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