DDR3 and DDR4 Ram

Actually, DDR3 and DDR4 are a class of Ram falls under DDR SDRAM category where DDR stands for Double Data Rate. Well, you can now gain an insight to answer the question What DDR3 and DDR4 stand for? Of course, It stands for Double Data Rate Version 3 and 4 respectively.

DDR SDRAM Overview

Okay, Let me start explaining about DDR SDRAM. Have Fun.


DDR Ram is a class of Integrated Circuits which evolves from SDR Ram. Since DDR Stands for Double Date Rate. SDR stands for Single data rate. Means in it we get double data transfer rates as compared to SDR. According to this Wiki Article, You can calculate the data transfer rates for a DDR Ram as follow:

With data being transferred 64 bits at a time, DDR SDRAM gives a transfer rate (in bytes/s) of (memory bus clock rate) × 2 (for dual rate) × 64 (number of bits transferred) / 8 (number of bits/byte). Thus, with a bus frequency of 100 MHz, DDR SDRAM gives a maximum transfer rate of 1600 MB/s.


Right Now, there are three types of RAM which can easily available in the Tech Market these days. Those are DDR3, DDR3L and DDR4.

Finally, Here we compare between DDR3 and DDR4 Ram.

DDR3 VS DDR4: Comparision

Chip Densities (Means the number of memory module which meant the number of small black DRAM chips that make up the memory module)512Mb-8Gb4Gb-16GbLarger DIMM Capacities
Data Rates (Means the Transfer rate of Data)800Mb/s – 2133Mb/s1600Mb/s – 3200Mb/sMigration to Higher-Speed I/O
Voltage (Means the Voltage at which it works)1,5V1,2VReduced Memory Power Demand
Low Voltage Standard (The Maximum low voltage it can run on)Yes (DDR3L at 1.35V)Anticipated at 1.05VMemory Power Reductions
Internal Banks (Internal Banks means that DRAM components, i.e. chips, can be divided in three different organizations: x4, x8, and x16)816More Banks
Bank Groups ( Bank Group Means that the chips were fused in a such a way that 4, 8 or 16 chips are used to read and write the data simultaneously)04Faster Burst Accesses
VREF inputs (VREF stands for Voltage reference)2 – DQs and CMD/ADDR1 – CMD/ADDRVREFDQ Now Internal


If you want to read more about DDR Technology you can refer here.

You can also read our post on How to download torrent files by Using Bytesloader and Google Drive ?

Tech writer extraordinaire and SEO maven. Wordsmithing since 2017, I geek out on apps, gadgets, and social networks. Let's tech-tango together!

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