TYPES OF MEMORY
RAM ROM
RAM: random access memory, Primary work area for CPU & app, Volatile memory…types areà
v SIP: Single Inline Package inserted in socket…
v DIP: Dual Inline Package have two sets of pin used in sockets…
v SIMM: 32 bit data path & connectors are on same side, usually 72 pins & 12 chips, used in slots…
v DIMM: 64 bit data path & connectors are not on same side…
CLASSES OF RAM:
Ram access speed can be measured in nano second, speed can be 10–200 ns…
1: DRAM: Dynamic RAM uses SIP, DIP, SIMM, Access time 30 ns or greator…
2: SRAM: Static RAM used in CACHE mem, 10–30 ns…
3: EDO: Enhanced Data Out consist of 72/168 pin, 50–70 ns…
4: SDRAM: Synchronous DRAM support CPU, with speed of 100 MB…
5: VRAM: Video RAM for Vieo display adapter…
6: CACHE MEM: A section of high speed mem which stores data that the comp can access quickly, when processor references an add in mem, it checks cache memory first. It’s of 2 kinds..
Ø a: L1:- A mem chache built in 486 processor, Pentium have two L1, for data & for code…
Ø b: L2:- A mem chache built on MB having SRAM, faster than sys DRAM but slower than L1…
7: VIRTUAL MEM: Hard Disk is used as memory, when the real memory is low to run programs.
ROM Read Only Memory