There are three main types of RAM: Dynamic RAM (DRAM), Static RAM (SRAM), and Magnetoresistive RAM (MRAM). DRAM stores each bit in a separate capacitor and transistor, while SRAM uses multiple transistors per cell without capacitors. MRAM uses magnetic charges instead of electrical charges, providing greater storage capacity, lower power consumption, and faster access times than other RAM types. RAM technology has advanced from SDRAM to DDR1, DDR2, DDR3, and now DDR4, with increasing speeds and capacities over time.

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