brief information about ram

2. • There are three types of RAM :
RAM

4. Dynamic Random Access Memory
Has memory cells with a paired transistor &
capacitor.
Each bit data is store in separate capacitor .

5. Dynamic Random Access Memory
 Capacitor may be charged or uncharged.
 Charging & discharging represent the two values of
data (0,1)

6. Dynamic Random Access Memory
Types are:

8. 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.

9. Static Random Access Memory
Each SRAM is made of six transistors.
Each bit in an SRAM is stored on four transistor or
more.

11. Types are:
Static Random Access Memory

12. Static vs Dynamic

14. Magnetoresistive Random Access memory
 Stores data using magnetic charges instead of
electrical charges.

15.  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

16. 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 Association
Joint Electron Device Engineering Council
1.5 or 1.65 v
800 and 2400
16 Gb
1.2 v
1600 and 3200
128 Gb