Different Types of DRAM: SDRAM/DDR1/DDR2/DDR3/DDR4/LPDDR/GDDR

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In this video, different generations of Dynamic RAM (DRAM) has been compared in terms of their speed/bandwidth and power consumption, in terms of the memory packages (SIMM, DIMM, and SO-DIMM) and in terms of the types of applications in which they are used. In this video, it has been also discussed that how higher speed has been achieved in each generation over the previous generation.

Asynchronous DRAM:
In this type of RAM, the RAM is not synchronized with the CPU Clock.

Synchronous DRAM (SDRAM):
In this type of RAM, the RAM is synchronized with the CPU clock.
It is also known as the Single Data Rate SDRAM, as data is being transferred on the rising edge of every clock pulse.

DDR SDRAM (Double Data Rate SDRAM):
In this type of RAM, the data is transferred twice during each clock cycle, with rising and falling edge.

Different Generations of DDR RAMs are DDR1/DDR2/DDR3/DDR4. In each generation of DDR RAM, the speed of the RAM was increased and power consumption has been reduced.

RAM Packages:
DIP (Dual In LIne Package)
SIMM (Single In line Modules)
DIMM (Dual In Line Module)
SO-DIMM (Small Outline DIMM)

Mobile DDR / Low Power DDR (MDDR/LPDDR)
This type of RAM is used inside the smartphones, which is optimized for the low power consumption.

Graphics DDR (GDDR):
This type of RAM is used in graphics cards for multimedia applications which required very high bandwidth.

Timestamps for the different topics in the video:

1:25 Asynchronous DRAM
1:48 Synchronous DRAM (SDRAM)
4:51 DDR1
6:45 DDR2
8:43 DDR3
10:17 DDR4
12:22 SIMM (Single Inline Module)
12:58 DIMM (Dual Inline Module)
13:40 SO-DIMM
14:20 MDDR/LPDDR
15:03 GDDR

This video will be helpful to all the students of science and engineering in understanding the different types of DRAM.

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Great video, very easy to follow. Thanks for putting so much work into it along with all the editing necessary.

jefflassek
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4 out of 5 points (1 point deduction for the intro music).

gnosis
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Thank you so much! It will be great if you can make another video talking about the details of the DDR buses and operational timing requirements.

dianec.
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7:29 Internal RAM width is 64 bit wide and I/O bus width is doubled, there's slight error, apart from that Brilliant Video thank you

vd
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Timestamps for the different topics in the video:

1:25 Asynchronous DRAM
1:48 Synchronous DRAM (SDRAM)
4:51 DDR1
6:45 DDR2
8:43 DDR3
10:17 DDR4
12:22 SIMM (Single Inline Module)
12:58 DIMM (Dual Inline Module)
13: 40 SO-DIMM
14:20 MDDR/LPDDR
15:03 GDDR

ALLABOUTELECTRONICS
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Well explained with simple words. Appreciate your help!

karislee
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I admire you effort in making your video more accessible by speaking in English.
Thanks, it was very informative!

chromeinox
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Thank you very much for detailed information on DDR's

ealurikarthik
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Awesome Explanation and Knowledge share! Cannot appreciate enough. Kudos to you!

venkatasimham
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Congratulations..
Quite simple explanation.. without any crap..
Keep it up..

apview
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This video is very helpful, Please make more video on DDR and LPDDR related to testing parameters

RAHULSINGH-wcht
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Great job. Thank You for much detailed information

merkel
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Thansk for information, , , may be new updated protocols needs to be added in new video

tusharpandeyst
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Why do I feel like there is some marketing trickery going on with these DDR SDRAM releases?

princesspuneta
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this video was very helpful, thanks!!

oskar
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Wow. Excellent teaching. God bless you

rattianaditamilan
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Thank you for sharing this nice video. Do you know the exact technology node of each of these DRAM generations?

mohammadfarmani
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Very informative video. Thanks, my friend 😘 ❤

Helal_Tech
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Simply presented Very iformative Thank you

rejithavijay
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2 correction:
1.dram on the basis of dimm...ddr2 voltage correction from 2.8 to 1.8
2. In last, comparison table...ddr2--> bus clock replace 533.33 by 133.33

sunshine_shine