Details of RAM and its types.

1. Presented By
Amzad Khan
*

2. *RAM
*RAM stands for Random access memory. Also
called Volatile memory or Temporary Memory.
It is a type of temporary Storage devices. It
does not store data permanently. RAM loses all
its data once the power is turned off.

3. *
Ram is basically of two types:-
1- Static RAM
2- Dynamic RAM
Static RAM is a type of RAM that keeps the data fed to it. It
never has to be refreshed. Static memory cell takes up a
lot more space on a chip than a dynamic memory cell. This
makes static RAM expensive than DRAM.
on the other hand, Dynamic RAM constantly needs to be
refreshed otherwise the stored data will be lost.

4. *
*FPM DRAM
FPM DRAM stands for FAST PAGE MODE DYNAMIC
RANDOM ACCESS MEMORY. IT WAS THE ORIGINAL FORM
OF dram. It waits through the entire process of locating
a bit of data by column and row and then reading the
bit before its starts on the next bit. It operated at
approximately 176 Mbps. Its clock rate is 25 MHz.
1. Capacity 4 MB-128 MB
2. Pins 30
3. Introduced in 1990
4. Used in 80286 model.

5. *
*EDO DRAM
EDO DRAM stands for EXTENDED DATA OUT DYNAMIC
RANDOM ACCESS MEMORY. EDO RAM was a moderate
form of FPM DRAm. Its efficiency and speed is greater
then FPM DRAM. It operate at approx 264 MBPS. It is
aboujt five percent faster than FPM.
1. Capacity 1MB-512 MB
2. Clock rate 40 MHz
3. Pins 72
4. Introduced in 1994
5. Used in 80386,80486 and P1.

6. *
*SDR RAM
SDR RAM stands for Single Data Rate RANDOM ACCESS
MEMORY. SDR RAM was a moderate form of EDO DRAM.
1. Introduce in 1996
2. Range 4 MB- 1 GB
3. Clock rate 133MHz
4. Pin 168
5. Cuts is 2
6. Used in P2, P3, and P4.

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*RD RAM
RD RAM stands for Rambus Dynamic RANDOM ACCESS
MEMORY. It was moderate from SDR RAM. Its efficiency
and speed is greater then SDR RAM.
1. Introduced in 1999.
2. Range 4 MB- 1 GB
3. Clock rate 400MHz
4. Pin 184
5. Used in P4
6. Cut is 2 in Centre

8. *
*DDR RAM
DDR RAM stand for Double Data Rate Random Access
Memory. DDR Ram was a moderate from of SDR RAM. Its
efficiency and speed is greater then SDR RAM
1. Introduced in 2000.
2. Range 4 MB- 2GB
3. Clock rate 266 MHz.
4. Pins 184
5. Used in P4
6. Cut is 1

9. *
*DDR2 RAM
DDR2 RAM was a moderate from of DDR RAM. Its
efficiency and speed is greater then DDR RAM
1. Introduced in 2003
2. Range 32MB- 2GB
3. Clock rate 533 MHZ
4. Pin 240
5. Used in P4, PD, Dual to Core, Core to Duo and
Quad.
6. Cut is 1.

10. *
*DDR3 RAM
DDR3 RAM was a moderate from of DDR2 RAM. Its
efficiency and speed is greater then DDR2 RAM
1. Introduced in 2007
2. Range 512MB- 4GB
3. Clock rate 800 MHZ
4. Pin 240
5. Used in i1,i3,i5 and i7
6. Cut is 1.

11. *
*DDR4 RAM
DDR4 RAM was a moderate from of DDR3 RAM. Its
efficiency and speed is greater then DDR3 RAM
1. Introduced in 2012
2. Range 512MB- 8GB
3. Clock rate 1600 MHZ
4. Pin 240
5. Used in i7 and i9
6. Cut is 1.

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