Computer Memory

Computer memory --- computer merory are two type

1. Primary memory.
   
2. Secondry memory.
   

Primary memory—Computer primary memory are two type.
1.ROM.
... 2.RAM.
Rom(Read Only Memory)--Computer rom are mainly three type
1.Prom-Programable Read Only Memory.

1. EPROM—Eresebal Programable read Only Meamory.
   
2. EEPROM-- Electrly Eresebal programable Read Only Memory.
   

RAM(Random Acces Memory)Computer RAM are mainly two type
1.SRAM(Static Random Acces Memory)
2.DRAM(Dynamic Random Acces Memory)

Static RAM –computer static ram are mainly two type
1.L1.(Leble 1)
2.L2.(Leble 2)

DRAM – Computer DRAM are mainly three type
1.SIMM(Single Inline Memory Module)
2.DIMM(Dual Inline Memory Module)
3.RIMM(Rambus Inline Memory Module)
SIMM – Computer SIMM RAM mainly two type

1. 72 pin
   
2. 32pin
   
3. 
   

72 pin SIMM RAM are mainly two type
1.EDO(Extended Data Output).
2.FPM(First Page Mode)


DIMM(Dual Inline Memory Module)
1.SD RAM(Syncronic Dynamic Random Acces Memory)Operating volt of this ram 3.3.pin-168.
FSB of this type ram 66mhz to 133 mhz.Capacity of this type ram is 32 MB to 128MB

2.DDR(Dual Data Rate Random Acces Memory)Operating volt of this ram 2.5.pin-184.
FSB of this type ram 200mhz to 333 mhz.Capacity of this type ram is 64 MB to 1 GB

3.DDR2( Dual Data Rate Random Acces Memory 2)--Operating volt of this ram 1.8.pin-240.
FSB of this type ram 400 mhz to 800mhz.Capacity of this type ram is 256 MB to 2GB

4.DDR3( Dual Data Rate Random Acces Memory 3)--Operating volt of this ram 1.5.pin-240.
FSB of this type ram 1100 mhz to 1600 mhz.Capacity of this type ram is 512 MB to 4 GB

RIMM(Rambus Inline Memory Module) this type of ram mainly one type

1.RDRAM(Rmbus Dynamic Random Acces Memory) –It is a 184 pin ram. This type ram only use 850 cihip set mother board.Operating volt of this ram 2.5 .


Secondry Memory –Computer secondry are mainly three type

1. Magnetic this type of memory are two type
   (i)Serial Acceser
   (ii) Random Acceser-- this type of memory are two type
   (a)Rmoval(Flopy Disk)
   (b)Non Removal--(Hard disk)
   

1. Optical. Exa –CD, DVD, BRdisk
   
2. Solid State(Semiconductor like eliment)exa-pen Drive, Memory Card,