Ddr2 Vs Ddr3 Same Slot

DDR3 vs DDR4

  1. A motherboard with DDR4 slots cannot use DDR3, and you can't put DDR4 into a DDR3 slot. Quicker transfers while maintaining an overall latency comparable to DDR2 and DDR3. DDR3-1600 CL10 as an.
  2. Blackjack, craps, roulette and other slot ddr2 vs ddr3 table games offer higher Return to Player (RTP) percentages overall compared to stingier games like slots. We outline these figures in this guide for our top-rated casinos to help you pick the best places to play games that land you more money.
  3. DDR2 533 and DDR2 800 memory types are on the market. DDR3 SDRAM(Double Data Rate Three SDRAM): DDR3 memory reduces 40% power consumption compared to current DDR2 modules, allowing for lower operating currents and voltages (1.5 V, compared to DDR2´s 1.8 V or DDR´s 2.5 V). The transfer rate of DDR3 is 8001600 MT/s.
  4. DDR3 RAM consumes less power and produces less heat than DDR2 RAM at the same clock speed (e.g. DDR3 vs DDR2 RAM that is both running at 1,066 MHz). However there is a catch: RAM with higher clock speeds have higher power consumption so DDR3 RAM running at 2,133 MHz will still drain more power than DDR2 RAM at 1,066 MHz.

This article presents you a comparison between DDR3 and DDR4, highlighting the important differences between both RAMs. However, before delving into the difference between DDR3 and DDR4, let us see the specifications of both RAMS. As a matter of fact, DDR, which stands for Double Data Rate, is a specification used for RAM. DDR4 is the successor of DDR3 and hence consists of improvements in factors such as power consumption, size, speed and efficiency. DDR4, which was released this year, is still not much famous in the market but, in the next year, it will soon outstand DDR3. DDR4 RAMs consume less power than DDR3, but their speed is much higher. Also, the memory density allowed is higher in DDR4. The physical length of DDR3 and DDR4 are the same, but they are not backward compatible as the standard is different. Therefore, the notch in DDR3 and DDR4 are at different places and a DDR4 module will not fit into a DDR3 socket and vice versa.

What is DDR3?

DDR2 Vs DDR3 Vs DDR4 RAM DDR2. Credit: Amazon. DDR2 operates at twice the external data bus clock rate as DDR provides twice the bandwidth with the same latency. DDR3 has a low power consumption as compared to the predecessors and an increased capacity to transfer data at twice the rate of DDR2.

DDR3, which stands for Double Data Rate Type 3, is a type of Dynamic Random Access Memory (DRAM) that came as the successor of DDR and DDR2. It was released to the market in 2007 and today almost all computers and laptops in the market uses DDR3 as the RAM. The voltage specification for DDR is 1.5 V and, therefore, it consumes very less power when compared to its predecessors. DDR3 standard allows chips up to capacity 8 GB. DDR3 RAM are available for different frequencies such as 800, 1066, 1333, 1600, 1866, 2133 MHz. A DDR3 RAM module used for personal computers has 240 pins and the length is 133.35 mm. The DDR3 modules used on laptops are called SO-DIMM and its length is much smaller with a length of 67.6 mm and less number of pins that is 204 pins. There is a special version of DDR3 RAMs called DDR3 low voltage standard, which uses just 1.35 V instead of 1.5 V and is used in some mobile devices to achieve better battery life.

What is DDR4?

DDR4 was introduced this year (2014) as the successor to DDR3. Still DDR4 is not much famous in the market because it was just released a few month ago and hence the motherboards in the market still supports only DDR3. However, after a few months , DDR4 will surely take over DDR3. DDR4 stands for Double Data Rate Type 4 and it has several advancements and improvements over DDR3. DDR4 supports higher memory densities up to 16 GB. The frequency in which DDR4 modules are available is higher than what DDR3 supports and the values available are 1600, 1866, 2133, 2400, 2667, 3200 MHz. The power consumption is further reduced as the voltage specification is 1.2 V. The lengths of DDR4 modules are same as the respective lengths of DDR3 module, but the number of pins is increased. The version used for PCs have 288 pins while the SO-DIMM modules used for laptops have 260 pins. A Low voltage standard DDR4 RAM, which would use about 1.05 V, will be available targeting for mobile devices that needs better power efficiency.

What is the difference between DDR3 and DDR4?

• DDR4 is the successor of DDR3.

• DDR3 was introduced back in 2007 while DDR4 was introduced in 2014.

• DDR3 supports memory densities only up to 8 GB, but DDR4 supports memory densities up to 16 GB.

• The speeds or the frequency of DDR4 RAMs are much higher than the frequency of DDR3 modules. This makes DDR4 much faster by providing better transfer rate.

• DDR3 works at a voltage of 1.5V while DDR4 works at a lesser voltage, which is 1.2V making it more power efficient.

• There is a special version of both DDR3 and DDR4 called low voltage standard, which uses lesser voltage hence lesser power. The low voltage standard of DDR3 uses 1.35V while it is 1.05V for DDR4.

• DDR3 modules have only 240 pins, but DDR4 modules have 288 pins.

• Both DDR3 and DDR4 have a smaller sized module known as SO-DIMM used for mobile devices such as laptops. SO-DIMM DDR3 has 204 pins while SO-DIMM DDR4 has 260 pins.

• DDR3 memory modules are not compatible with DDR4 slots and DDR4 modules are not compatible with DDR3 slots.

• The notch in the DDR3 and DDR4 is placed at different places so that they will not be mistakenly fixed to wrongs slots.

• DDR3 supports only 8 internal memory banks, but DDR4 supports 16 memory banks.




Introduced in20072014
Memory DensityUp to 8 GBUp to 16 GB
Voltage1.5 V1.2 V
Voltage (Low voltage standard)1.35 V1.05 V
Supported Frequency (MHz)800, 1066, 1333, 1600, 1866, 21331600, 1866, 2133, 2400, 2667, 3200
Internal Banks816
No of Pins240288
No of Pins (SO-DIMM)204260


DDR4 vs DDR3

DDR4 being the successor of DDR3 has various improvements. The speed or the frequency of the RAM modules have been much increased in DDR4 giving better transfer rate. A DDR4 module can have a size of 16 GB while this limited to 8 GB for DDR3. However, the power consumption of DDR4 is much less with a 1.2 V voltage used instead of 1.5 V. Therefore, it would be much power efficient providing better battery life for mobile devices. DDR4 memory modules are not compatible with DDR3 slots and vice versa hence the slot on the motherboard determines which type of RAM must be fixed. Currently, the board manufacturers use DDR3 slots but , in the next years, it will transform to DDR4.

Images Courtesy:

1. DDR3 via Pixabay

2. Transcend_DDR400_TS64MLD64V4J By Solomon203 (Own work) [CC BY-SA 3.0 or GFDL], via Wikimedia Commons

Related posts:

A 200-pin PC2-5300 DDR2 SO-DIMM
A 204-pin PC3-10600 DDR3 SO-DIMM
A comparison between 200-pin DDR and DDR2 SDRAM SO-DIMMs, and a 204-pin DDR3 SO-DIMM module[1]
A SO-DIMM slot on a computer motherboard

A SO-DIMM, SODIMM, or small outline dual in-line memory module, is a type of computer memory built using integrated circuits. SO-DIMMs are a smaller alternative to a DIMM, being roughly half the size of regular DIMMs.


Hollywood casino bangor maine hours. SO-DIMMs are often used in systems that have limited space, which include laptops, notebooks, small-footprint personal computers such as those based on Mini-ITXmotherboards, high-end upgradable office printers, and networking hardware such as routers and NAS devices.[2]

  • 1Visual identification

Visual identification[edit]

Most types of SO-DIMMs can be recognized visually by the distinctive notches that “key” them for different applications:[1]

  • 100-pin SO-DIMMs (SDR SDRAM) have two notches.[3]
  • 144-pin SO-DIMMs (SDR SDRAM) have a single notch near the center.[4]
  • 200-pin SO-DIMMs (DDR SDRAM or DDR2 SDRAM) have a single notch nearer to one side.[5] The exact location of this notch varies (read below).
  • 204-pin SO-DIMMs (DDR3 SDRAM) have a single notch closer to the center than on 200-pin SO-DIMMs.[6]
  • 260-pin SO-DIMMs (DDR4 SDRAM), 69.6 mm (2.74 inches) wide and 30 mm (1.2 inches) high, making them 2 mm (0.079 inches) wider than DDR3 SO-DIMMs, with a single notch after pin 144.[7]
  • 260-pin SO-DIMMs (UniDIMM), 69.6 mm (2.74 inches) wide and 30 mm (1.2 inches) or 20 mm (0.79 inches) high, with a single notch placed differently than on DDR3 SO-DIMMs.[8][9]

Variants of 200-pin SO-DIMMs[edit]

The 200-pin SO-DIMM can be of the types DDR and DDR2. In both cases the notch is located at one fifth of the board length (20 pins + notch + 80 pins), but in DDR2 the notch is located slightly closer to the center of the board. These two types of memory are not interchangeable. The different notch locations are designed to prevent cross-installation, aiding at the same time in visually identifying 200-pin SO-DIMM modules.[1]

Ddr2 vs ddr3 pins

Ddr2 Ddr3 Same Slot

This variance is designed to prevent coupling of memory and controllers of different DDR generations due to electrical incompatibility. DDR SO-DIMMs operate at 2.5 V while DDR2 SO-DIMMs operate at 1.8 V.[10]

Variants of DDR3 SO-DIMMs[edit]

Ddr2 Vs Ddr3 Slot

These modules, while using the same physical layout, may differ in the specified voltage - 1.5 or 1.35 volts. The lower voltage modules are sometimes, but not always, identified as DDR3L - see also DDR3 SDRAM.

General characteristics[edit]

200-pin and 204-pin SO-DIMMs are 67.6 mm (2.66 inches) long, 31.75 mm (1.250 inches) wide, having a maximum total depth of 3.8 mm (0.15 inches).[11]

SO-DIMMs are nearly equal in power and voltage rating to DIMMs; SO-DIMM technology does not mean lower performance compared to larger DIMMs. For example, DDR3 SO-DIMMs provide clock speeds such as 533 MHz (1066 MT/s, PC3-8500), CAS latencies such as 7, and higher capacities such as 4 GB per module.[12]

DDR2 SO-DIMM memory modules commonly have clock speeds from 200 MHz upward (specifications). 204-pin SO-DIMMs can also contain DDR3 SDRAM, with specifications such as PC3-6400, PC3-8500, PC3-10600, PC3-14900 and PC3-17000.[13] 260-pin UniDIMMs contain DDR3 or DDR4 SDRAM depending on configuration. Some SO-DIMMs provide ECC functionality; unbuffered ECC SO-DIMMs are called SO-CDIMMs.[14]

See also[edit]

  • Dual in-line package (DIP)
  • Memory geometry – logical configuration of RAM modules (channels, ranks, banks, etc.)
  • Rambus in-line memory module (RIMM)
  • Single in-line memory module (SIMM)
  • Single in-line package (SIP)
  • Zig-zag in-line package (ZIP)


  1. ^ abc'Are DDR, DDR2 and DDR3 SO-DIMM memory modules interchangeable?'. acer.custhelp.com. Retrieved 2015-06-26.
  2. ^Synology Inc. 'Synology RAM Module'. synology.com.
  3. ^'RAMCHECK 100-Pin DDR Adapter, a tool for testing and identifying JEDEC-compliant 100-pin DDR SO-DIMM modules'. memorytesters.com. 2013. Retrieved 2015-06-26.
  4. ^'Small-outline SDRAM module (MT16LSDF3264(L)H 256 MB and MT16LSDF6464(L)H 512 MB) Datasheet'(PDF). Micron Technology. 2006-05-03. p. 22. Retrieved 2015-06-26.
  5. ^'DDR DIMM & SODIMM Modules (184-pin DDR DIMM, 100-pin DDR DIMM, and 200-pin DDR SO-DIMM modules)'(PDF). smartm.com. 2011. p. 4. Retrieved 2015-06-26.
  6. ^'NT2GC64B(C)H4B0PS / NT4GC64B(C)88B0(1)NS / NT8GC64B(C)8HB0NS PC3(L)-10600 / PC3(L)-12800 Unbuffered DDR3 SO-DIMM'(PDF). nanya.com. December 2012. p. 23. Retrieved 2015-06-26.
  7. ^'DDR4 SDRAM SO-DIMM (MTA18ASF1G72HZ, 8 GB) Datasheet'(PDF). Micron Technology. 2014-09-10. p. 18. Archived from the original(PDF) on 2014-11-29. Retrieved 2015-06-26.
  8. ^Geof Findley; Becky Loop (2014-09-16). 'DDR4: The Right Memory for Your Next Server and High-End Desktop System'(PDF). intel.activeevents.com. Intel. p. 28. Archived from the original(PDF) on 2014-12-17. Retrieved 2015-06-26.
  9. ^'How Intel Plans to Transition Between DDR3 and DDR4 for the Mainstream'. techpowerup.com. 2014-09-14. Retrieved 2015-06-26.
  10. ^'DRAM – Can I mix DDR, DDR2 and DDR3 modules-my PC?'. integralmemory.com. Retrieved 2015-06-26.
  11. ^micron.com - 200 Pin, PC2700 DDR SDRAM Unbuffered SO–DIMM REFERENCE DESIGN SPECIFICATIONArchived 2010-09-23 at the Wayback Machine page 26
  12. ^'Corsair Memory — 4GB DDR3 SODIMM Memory (CM3X4GSD1066)'. corsair.com. Retrieved 1 October 2015.
  13. ^'204-Pin DDR3 SDRAM Unbuffered SODIMM Design Specification'.
  14. ^'Define-SO-CDIMM'. RAMpedia. Retrieved 2014-08-24.

External links[edit]

Wikimedia Commons has media related to SO-DIMM.
  • Ruggedizing RAM for industrial systems (XR-DIMM form factor)

Ddr2 Vs Ddr3 Ram

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