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Ram and its types

This document discusses the history and types of RAM. It begins by defining RAM as random access memory that is volatile and temporary. It then describes the two main types: static RAM and dynamic RAM (DRAM). The document proceeds to discuss the evolution of different DRAM technologies over time, including FPM DRAM, EDO DRAM, SDR RAM, DDR RAM, DDR2, DDR3, and DDR4. It notes that each new generation provides improved efficiency and speed over the previous. The document concludes by discussing some limitations of RAM and promising future technologies like RRAM and Z-RAM.

Engineering◦
IN THE NAME OF ALLAH WHO IS THE MOST BENEFICENT AND MOST MERCIFUL.
GOVERNMENT COLLEGE OF TECHNOLOGY RAILWAY ROAD LAHORE FARAZ QURESHI 14-BSM-101 SECTION A (BSC MECHANICAL ENGINEERING TECHNOLOGY) SESSION 2014-2018 PRESENTED BY:
RAM AND ITS TYPES
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.
TYPES OF RAM RAM is basically of two types:  Static RAM Dynamic RAM Static RAM is a type of RAM that keeps the data fed to it. It never has to be refreshed. This makes static RAM significantly faster than dynamic RAM . 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.
TYPES OF DRAM 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 it starts on the next bit. It operated at approximately 176 Mbps.Its clock rate is 25 MHZ. I. Capacity 4MB – 128MB. II. Pins 30 . III. Introduced in 1990. IV. Used in 80286 model
EDO DRAM:- EDO DRAM stand for Extended Data Out Dynamic Random Access Memory. EDO DRAM was a moderate form of FMP DRAM. Its efficiency and speed is greater then FPM DRAM. It operate at approximately 264MBPs.It is about five percent faster than FPM. I. Introduced in 1994. II. Range 1Mb-512 Mb. III. Clock rate 40MHz. IV. Pins 72 V. Used in 80386,80486 and p1. VI. Pins golden
SDR RAM:- SDR RAM stand for Single Data Rate Random Access Memory. SDR RAM was a moderate form of EDO DRAM. I. Introduced in 1996. II. Range 4MB-1GB. III. Clock rate 133MHz. IV. Pins 168. V. Cuts is 2. VI. Used In p2,p3 and p4.
RD RAM:- RD RAM stand for Rambus Dynamic Random Access Memory. RD RAM was a moderate form of SDR RAM. Its efficiency and speed is greater then SDR RAM. I. Introduced in 1999. II. Range 4MB-1GB. III. Clock rate 400MHz IV. Pins 184 V. Used in p4 VI. Cut is 2 in Centre
DDR RAM:- DDR RAM stand for Double Data Rate Random Access Memory. DDR RAM was a moderate form of SDR RAM. Its efficiency and speed is greater then SDR RAM. I. Introduced in 2000. II. Range 4MB-2GB. III. Clock rate 266MHz IV. Pins 184 V. Used in p4 VI. Cut is 1
DDR2 RAM:- DDR2 RAM was a moderate form of DDR RAM. Its efficiency and speed is greater then DDR RAM. I. Introduced in 2003. II. Range 32MB-2GB. III. Clock rate 533MHz IV. Pins 240 V. Used in p4,PD,Dual to Core, Core to Duo and Quard VI. Cut is 1
▪ DDR3 RAM:- DDR3 RAM was a moderate form of DDR2 RAM. Its efficiency and speed is greater then DDR2 RAM. I. Introduced in 2007. II. Range 512MB-4GB. III. Clock rate 800MHz IV. Pins 240 V. Used in i1,i3,i5 and i7 VI. Cut is 1
DDR4 RAM:- DDR4 RAM was a moderate form of DDR3 RAM. Its efficiency and speed is greater then DDR3 RAM. I. Introduced in 2012. II. Range 512-8GB. III. Clock rate 1600MHz IV. Pins 240 V. Used in i7 and i9 VI. Cut is 1
DIFFERENT NUMBER OF PINS IN RAMS
SOME MORE TYPES OF RAM SIP RAM (SINGLE INLINE PACKAGE) SIMMRAM(SINGLE INLINE MEMORY MODULE) PARITY RAM NON PARITY RAM EDO RAM NON EDO RAM RRAM (Resistive RAM) Z-RAM (Zero-capacitor RAM)
LIMITATION OF RAM One of the biggest drawback of Random Access Memory is that it is a volatile memory. That means whenever the computer is switched off all the data that was stored in the RAM is lost. Another limitation of RAM is space limitation. The cost per bit for RAM is high as compared to ROM, because of this reason it is not used for mass storage.
CONCLUSION The amount of RAM matters more than the type of RAM. This is because more the RAM available in a system, more number of tasks can be performed simultaneously without any performance drop.
FUTURE OF RAM… ▪ Future computers and electronic gadgets will need memory chips that are smaller, faster and cheaper than those of today . ▪ RRAM (Resistive RAM) and Z-RAM (Zero-capacitor RAM) are runners in the global technology race as the next generation RAM.
Ram and its types