SlideShare une entreprise Scribd logo
1  sur  18
Télécharger pour lire hors ligne
Types of RAM
Outline
• Introduction .
• RAM types .
• DRAM .
• SRAM .
Introduction
RAM “Random Access Memory” is a form of
data storage that can be accessed randomly at
any time, in any order and from any physical
location., allowing quick access.
RAM is volatile i.e. its contents are lost when
the device is powered off.
RAM allows the computer to read data quickly
to run applications. It allows reading and
writing.
RAM types
The two main types of RAM are static
RAM and dynamic RAM.
Static RAM (SRAM)
 4 times more expensive
 Very low access time .
 Information stored on
RS flip-flops .
 No need for refreshing .
 They made of transistors
 it is used in cache .
 They can be either
Bipolar or MOS
technology .
Dynamic RAM (DRAM)
 Low cost .
 Consumes less power .
 Information stored on
FET transistors .
 Needs to be refreshed .
 These are mostly made
of capacitors .
 it is used in main
memory
 These are available
only in MOS technology
RAM types
FPM RAM
• 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. Maximum
transfer rate to L2 cache is approximately 176 Mbps.
EDO RAM
• Extended data-out Dynamic Random Access Memory
does not wait for all of the processing of the first bit before
continuing to the next one. As soon as the address of the first
bit is located, EDO DRAM begins looking for the next bit. It is
about five percent faster than FPM. Maximum transfer rate to
L2 cache is approximately 264 Mbps.
SDRAM
• Synchronous DRAM .
• SDRAM is a type of dynamic random access memory which is
synchronized with the clock speed that the microprocessor is
optimized for. SDRAM is about five percent faster than EDO
RAM and is the most common form in desktops today. Maximum
transfer rate to L2 cache is approximately 528 Mbps.
DDR RAM
• Double data rate synchronous dynamic RAM is just like
SDRAM except that is has higher bandwidth, meaning greater
speed. It is a newer variant of SDRAM. Maximum transfer rate
to L2 cache is approximately 1,064 Mbps .
DDR2 RAM
• Double Data Rate 2 .
• newer version of DDR .
• twice as fast as the original DDR RAM.
• 2003 .
• still is double data rate just like the original DDR.
• DDR2-RAM has modified signaling which enables higher
speeds to be achieved with more immunity to signal noise
and cross-talk between signals .
Types of RAM
Types of RAM
RDRAM
• Rambus dynamic random access memory : Designed by
Rambus, RDRAM uses a Rambus in-line memory module
(RIMM), which is similar in size and pin configuration to a
standard DIMM. RDRAM memory chips work in parallel to
achieve a data rate of 800 MHz, or 1,600 Mbps. Since they
operate at such high speeds, they generate much more heat
than other types of chips .
Types of RAM
Types of RAM
Types of RAM
REFERANCE
• http://www.diffen.com/difference/RAM_vs_ROM
• http://en.wikipedia.org/wiki/Random_access_memory
• https://www.google.ps/search?tbm=isch&q=compare+bet
ween+type+of+DRAM+&ei=Lxk0VaDUB4HasgH0qISoBg#imgrc
=_
• MEMORY : RAM AND ITS USES – SHARDA UNIVERSITY - School
of Engineering & technology - DIGITAL ELECTRONICS – I
• Computer Organization and Architecture Designing for
Performance (8th Edition)
Types of RAM

Contenu connexe

Tendances

Tendances (20)

Ram and its types
Ram and its typesRam and its types
Ram and its types
 
RAM(Random Access Memory)
RAM(Random Access Memory)RAM(Random Access Memory)
RAM(Random Access Memory)
 
HARD DISK DRIVE
HARD DISK DRIVE HARD DISK DRIVE
HARD DISK DRIVE
 
RAM (Random Access Memory)
RAM (Random Access Memory)RAM (Random Access Memory)
RAM (Random Access Memory)
 
computer memory and memory module
computer memory and memory modulecomputer memory and memory module
computer memory and memory module
 
Types of rom
Types of romTypes of rom
Types of rom
 
Computer memory in general
Computer memory in generalComputer memory in general
Computer memory in general
 
Ram & rom
Ram & romRam & rom
Ram & rom
 
RAM
RAMRAM
RAM
 
Hard disk PPT
Hard disk PPTHard disk PPT
Hard disk PPT
 
Ram presentation
Ram presentationRam presentation
Ram presentation
 
COMPUTER MEMORY : TYPES & FUNCTIONS
COMPUTER MEMORY : TYPES & FUNCTIONSCOMPUTER MEMORY : TYPES & FUNCTIONS
COMPUTER MEMORY : TYPES & FUNCTIONS
 
Bios
BiosBios
Bios
 
Random access memory
Random access memoryRandom access memory
Random access memory
 
Basics Of Semiconductor Memories
Basics Of Semiconductor MemoriesBasics Of Semiconductor Memories
Basics Of Semiconductor Memories
 
Chapter01Introducing Hardware
Chapter01Introducing HardwareChapter01Introducing Hardware
Chapter01Introducing Hardware
 
Motherboard, It's Functions and It's Components
Motherboard, It's Functions and It's ComponentsMotherboard, It's Functions and It's Components
Motherboard, It's Functions and It's Components
 
Memory Organization
Memory OrganizationMemory Organization
Memory Organization
 
Motherboard
MotherboardMotherboard
Motherboard
 
Ram presentation
Ram presentationRam presentation
Ram presentation
 

Similaire à Types of RAM (20)

memory.pptx
memory.pptxmemory.pptx
memory.pptx
 
Ram ppt
Ram pptRam ppt
Ram ppt
 
SMPR.pptx
SMPR.pptxSMPR.pptx
SMPR.pptx
 
Topic 10- Random Access Memory (RAM).pptx
Topic 10- Random Access Memory (RAM).pptxTopic 10- Random Access Memory (RAM).pptx
Topic 10- Random Access Memory (RAM).pptx
 
Random Access Memory ppt
Random Access Memory pptRandom Access Memory ppt
Random Access Memory ppt
 
Memory - RAM and its types
Memory - RAM and its typesMemory - RAM and its types
Memory - RAM and its types
 
Dram and its types
Dram and its typesDram and its types
Dram and its types
 
Cse
CseCse
Cse
 
Memory Hierarchy (RAM and ROM)
Memory Hierarchy (RAM and ROM)Memory Hierarchy (RAM and ROM)
Memory Hierarchy (RAM and ROM)
 
Static and dynamic memories
Static and dynamic memoriesStatic and dynamic memories
Static and dynamic memories
 
Random Access memory.
Random Access memory.Random Access memory.
Random Access memory.
 
Memory.pptx
Memory.pptxMemory.pptx
Memory.pptx
 
Memory
MemoryMemory
Memory
 
RAM And ROM
RAM And ROMRAM And ROM
RAM And ROM
 
project on memories .pptx
project on memories .pptxproject on memories .pptx
project on memories .pptx
 
Internal memory
Internal memoryInternal memory
Internal memory
 
It compter applications
It compter applicationsIt compter applications
It compter applications
 
RAM and its Types
RAM and its TypesRAM and its Types
RAM and its Types
 
RAM pppt.pptx
RAM pppt.pptxRAM pppt.pptx
RAM pppt.pptx
 
05 internal memory
05 internal memory05 internal memory
05 internal memory
 

Dernier

Graphics Primitives and CG Display Devices
Graphics Primitives and CG Display DevicesGraphics Primitives and CG Display Devices
Graphics Primitives and CG Display DevicesDIPIKA83
 
Technology Features of Apollo HDD Machine, Its Technical Specification with C...
Technology Features of Apollo HDD Machine, Its Technical Specification with C...Technology Features of Apollo HDD Machine, Its Technical Specification with C...
Technology Features of Apollo HDD Machine, Its Technical Specification with C...Apollo Techno Industries Pvt Ltd
 
Multicomponent Spiral Wound Membrane Separation Model.pdf
Multicomponent Spiral Wound Membrane Separation Model.pdfMulticomponent Spiral Wound Membrane Separation Model.pdf
Multicomponent Spiral Wound Membrane Separation Model.pdfGiovanaGhasary1
 
Modelling Guide for Timber Structures - FPInnovations
Modelling Guide for Timber Structures - FPInnovationsModelling Guide for Timber Structures - FPInnovations
Modelling Guide for Timber Structures - FPInnovationsYusuf Yıldız
 
Renewable Energy & Entrepreneurship Workshop_21Feb2024.pdf
Renewable Energy & Entrepreneurship Workshop_21Feb2024.pdfRenewable Energy & Entrepreneurship Workshop_21Feb2024.pdf
Renewable Energy & Entrepreneurship Workshop_21Feb2024.pdfodunowoeminence2019
 
cloud computing notes for anna university syllabus
cloud computing notes for anna university syllabuscloud computing notes for anna university syllabus
cloud computing notes for anna university syllabusViolet Violet
 
Landsman converter for power factor improvement
Landsman converter for power factor improvementLandsman converter for power factor improvement
Landsman converter for power factor improvementVijayMuni2
 
Strategies of Urban Morphologyfor Improving Outdoor Thermal Comfort and Susta...
Strategies of Urban Morphologyfor Improving Outdoor Thermal Comfort and Susta...Strategies of Urban Morphologyfor Improving Outdoor Thermal Comfort and Susta...
Strategies of Urban Morphologyfor Improving Outdoor Thermal Comfort and Susta...amrabdallah9
 
Mohs Scale of Hardness, Hardness Scale.pptx
Mohs Scale of Hardness, Hardness Scale.pptxMohs Scale of Hardness, Hardness Scale.pptx
Mohs Scale of Hardness, Hardness Scale.pptxKISHAN KUMAR
 
Power System electrical and electronics .pptx
Power System electrical and electronics .pptxPower System electrical and electronics .pptx
Power System electrical and electronics .pptxMUKULKUMAR210
 
EPE3163_Hydro power stations_Unit2_Lect2.pptx
EPE3163_Hydro power stations_Unit2_Lect2.pptxEPE3163_Hydro power stations_Unit2_Lect2.pptx
EPE3163_Hydro power stations_Unit2_Lect2.pptxJoseeMusabyimana
 
Dev.bg DevOps March 2024 Monitoring & Logging
Dev.bg DevOps March 2024 Monitoring & LoggingDev.bg DevOps March 2024 Monitoring & Logging
Dev.bg DevOps March 2024 Monitoring & LoggingMarian Marinov
 
ASME BPVC 2023 Section I para leer y entender
ASME BPVC 2023 Section I para leer y entenderASME BPVC 2023 Section I para leer y entender
ASME BPVC 2023 Section I para leer y entenderjuancarlos286641
 
A Seminar on Electric Vehicle Software Simulation
A Seminar on Electric Vehicle Software SimulationA Seminar on Electric Vehicle Software Simulation
A Seminar on Electric Vehicle Software SimulationMohsinKhanA
 
Popular-NO1 Kala Jadu Expert Specialist In Germany Kala Jadu Expert Specialis...
Popular-NO1 Kala Jadu Expert Specialist In Germany Kala Jadu Expert Specialis...Popular-NO1 Kala Jadu Expert Specialist In Germany Kala Jadu Expert Specialis...
Popular-NO1 Kala Jadu Expert Specialist In Germany Kala Jadu Expert Specialis...Amil baba
 
Quasi-Stochastic Approximation: Algorithm Design Principles with Applications...
Quasi-Stochastic Approximation: Algorithm Design Principles with Applications...Quasi-Stochastic Approximation: Algorithm Design Principles with Applications...
Quasi-Stochastic Approximation: Algorithm Design Principles with Applications...Sean Meyn
 
Vertical- Machining - Center - VMC -LMW-Machine-Tool-Division.pptx
Vertical- Machining - Center - VMC -LMW-Machine-Tool-Division.pptxVertical- Machining - Center - VMC -LMW-Machine-Tool-Division.pptx
Vertical- Machining - Center - VMC -LMW-Machine-Tool-Division.pptxLMW Machine Tool Division
 

Dernier (20)

Graphics Primitives and CG Display Devices
Graphics Primitives and CG Display DevicesGraphics Primitives and CG Display Devices
Graphics Primitives and CG Display Devices
 
Technology Features of Apollo HDD Machine, Its Technical Specification with C...
Technology Features of Apollo HDD Machine, Its Technical Specification with C...Technology Features of Apollo HDD Machine, Its Technical Specification with C...
Technology Features of Apollo HDD Machine, Its Technical Specification with C...
 
Multicomponent Spiral Wound Membrane Separation Model.pdf
Multicomponent Spiral Wound Membrane Separation Model.pdfMulticomponent Spiral Wound Membrane Separation Model.pdf
Multicomponent Spiral Wound Membrane Separation Model.pdf
 
Modelling Guide for Timber Structures - FPInnovations
Modelling Guide for Timber Structures - FPInnovationsModelling Guide for Timber Structures - FPInnovations
Modelling Guide for Timber Structures - FPInnovations
 
Renewable Energy & Entrepreneurship Workshop_21Feb2024.pdf
Renewable Energy & Entrepreneurship Workshop_21Feb2024.pdfRenewable Energy & Entrepreneurship Workshop_21Feb2024.pdf
Renewable Energy & Entrepreneurship Workshop_21Feb2024.pdf
 
cloud computing notes for anna university syllabus
cloud computing notes for anna university syllabuscloud computing notes for anna university syllabus
cloud computing notes for anna university syllabus
 
Landsman converter for power factor improvement
Landsman converter for power factor improvementLandsman converter for power factor improvement
Landsman converter for power factor improvement
 
Strategies of Urban Morphologyfor Improving Outdoor Thermal Comfort and Susta...
Strategies of Urban Morphologyfor Improving Outdoor Thermal Comfort and Susta...Strategies of Urban Morphologyfor Improving Outdoor Thermal Comfort and Susta...
Strategies of Urban Morphologyfor Improving Outdoor Thermal Comfort and Susta...
 
Mohs Scale of Hardness, Hardness Scale.pptx
Mohs Scale of Hardness, Hardness Scale.pptxMohs Scale of Hardness, Hardness Scale.pptx
Mohs Scale of Hardness, Hardness Scale.pptx
 
Litature Review: Research Paper work for Engineering
Litature Review: Research Paper work for EngineeringLitature Review: Research Paper work for Engineering
Litature Review: Research Paper work for Engineering
 
Lecture 4 .pdf
Lecture 4                              .pdfLecture 4                              .pdf
Lecture 4 .pdf
 
Power System electrical and electronics .pptx
Power System electrical and electronics .pptxPower System electrical and electronics .pptx
Power System electrical and electronics .pptx
 
EPE3163_Hydro power stations_Unit2_Lect2.pptx
EPE3163_Hydro power stations_Unit2_Lect2.pptxEPE3163_Hydro power stations_Unit2_Lect2.pptx
EPE3163_Hydro power stations_Unit2_Lect2.pptx
 
Dev.bg DevOps March 2024 Monitoring & Logging
Dev.bg DevOps March 2024 Monitoring & LoggingDev.bg DevOps March 2024 Monitoring & Logging
Dev.bg DevOps March 2024 Monitoring & Logging
 
ASME BPVC 2023 Section I para leer y entender
ASME BPVC 2023 Section I para leer y entenderASME BPVC 2023 Section I para leer y entender
ASME BPVC 2023 Section I para leer y entender
 
A Seminar on Electric Vehicle Software Simulation
A Seminar on Electric Vehicle Software SimulationA Seminar on Electric Vehicle Software Simulation
A Seminar on Electric Vehicle Software Simulation
 
Lecture 2 .pdf
Lecture 2                           .pdfLecture 2                           .pdf
Lecture 2 .pdf
 
Popular-NO1 Kala Jadu Expert Specialist In Germany Kala Jadu Expert Specialis...
Popular-NO1 Kala Jadu Expert Specialist In Germany Kala Jadu Expert Specialis...Popular-NO1 Kala Jadu Expert Specialist In Germany Kala Jadu Expert Specialis...
Popular-NO1 Kala Jadu Expert Specialist In Germany Kala Jadu Expert Specialis...
 
Quasi-Stochastic Approximation: Algorithm Design Principles with Applications...
Quasi-Stochastic Approximation: Algorithm Design Principles with Applications...Quasi-Stochastic Approximation: Algorithm Design Principles with Applications...
Quasi-Stochastic Approximation: Algorithm Design Principles with Applications...
 
Vertical- Machining - Center - VMC -LMW-Machine-Tool-Division.pptx
Vertical- Machining - Center - VMC -LMW-Machine-Tool-Division.pptxVertical- Machining - Center - VMC -LMW-Machine-Tool-Division.pptx
Vertical- Machining - Center - VMC -LMW-Machine-Tool-Division.pptx
 

Types of RAM

  • 2. Outline • Introduction . • RAM types . • DRAM . • SRAM .
  • 3. Introduction RAM “Random Access Memory” is a form of data storage that can be accessed randomly at any time, in any order and from any physical location., allowing quick access. RAM is volatile i.e. its contents are lost when the device is powered off. RAM allows the computer to read data quickly to run applications. It allows reading and writing.
  • 4. RAM types The two main types of RAM are static RAM and dynamic RAM. Static RAM (SRAM)  4 times more expensive  Very low access time .  Information stored on RS flip-flops .  No need for refreshing .  They made of transistors  it is used in cache .  They can be either Bipolar or MOS technology . Dynamic RAM (DRAM)  Low cost .  Consumes less power .  Information stored on FET transistors .  Needs to be refreshed .  These are mostly made of capacitors .  it is used in main memory  These are available only in MOS technology
  • 6. FPM RAM • 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. Maximum transfer rate to L2 cache is approximately 176 Mbps.
  • 7. EDO RAM • Extended data-out Dynamic Random Access Memory does not wait for all of the processing of the first bit before continuing to the next one. As soon as the address of the first bit is located, EDO DRAM begins looking for the next bit. It is about five percent faster than FPM. Maximum transfer rate to L2 cache is approximately 264 Mbps.
  • 8. SDRAM • Synchronous DRAM . • SDRAM is a type of dynamic random access memory which is synchronized with the clock speed that the microprocessor is optimized for. SDRAM is about five percent faster than EDO RAM and is the most common form in desktops today. Maximum transfer rate to L2 cache is approximately 528 Mbps.
  • 9. DDR RAM • Double data rate synchronous dynamic RAM is just like SDRAM except that is has higher bandwidth, meaning greater speed. It is a newer variant of SDRAM. Maximum transfer rate to L2 cache is approximately 1,064 Mbps .
  • 10. DDR2 RAM • Double Data Rate 2 . • newer version of DDR . • twice as fast as the original DDR RAM. • 2003 . • still is double data rate just like the original DDR. • DDR2-RAM has modified signaling which enables higher speeds to be achieved with more immunity to signal noise and cross-talk between signals .
  • 13. RDRAM • Rambus dynamic random access memory : Designed by Rambus, RDRAM uses a Rambus in-line memory module (RIMM), which is similar in size and pin configuration to a standard DIMM. RDRAM memory chips work in parallel to achieve a data rate of 800 MHz, or 1,600 Mbps. Since they operate at such high speeds, they generate much more heat than other types of chips .
  • 17. REFERANCE • http://www.diffen.com/difference/RAM_vs_ROM • http://en.wikipedia.org/wiki/Random_access_memory • https://www.google.ps/search?tbm=isch&q=compare+bet ween+type+of+DRAM+&ei=Lxk0VaDUB4HasgH0qISoBg#imgrc =_ • MEMORY : RAM AND ITS USES – SHARDA UNIVERSITY - School of Engineering & technology - DIGITAL ELECTRONICS – I • Computer Organization and Architecture Designing for Performance (8th Edition)

Notes de l'éditeur

  1. Dynamic RAM (DRAM) The term "Fast Page Mode" comes from the capability of memory being able to access data that is on the same page. 486 and Pentium .
  2. Extended Data Out DRAM Once the required data is found the searching for the next bit will start Output is about 264 Mbps . refers to fact that the data output drivers on the memory module are not switched off when the memory controller removes the column address to begin the next cycle .
  3. Synchronous DRAM Once the first bit is found reads the data from the entire row. Relies on the fact that data is written in rows Output is about 528 Mbps SDRAM is capable of running at 133MHz which is about three times faster than FPM RAM and twice as fast as EDO RAM .
  4. Double Data Rate SDRAM Reads data from memory on the rising clock and falling clock signal. Allowing double capacity over SDRAM Output is about 1064 Mbps transfers data twice per clock cycle which effectively doubles the data rate . become mainstream in the graphics card market and has become the memory standard.