What's the Difference between DDR2 and DDR3 RAM?įrom the DDR2 vs DDR3 table above, we can see that DDR3 RAM offers better performance while consuming less power. In short, DDR2 and DDR3 RAM are not compatible with each other: If your motherboard has DDR2 RAM slots, then you can only use DDR2 RAM.
This difference in notch position is also why you can't use DDR3 RAM in a DDR2 system or install DDR2 RAM into a DDR3 slot (even though they have the same number of pins).
DDR3: distance between left side of RAM stick and notch = 5.4 cm (2.1 in). DDR2: distance between left side of RAM stick and notch = 7.1 cm (2.8 in). Here's the trick to tell them apart: Look at their notch positions (circled in yellow above).Īs you can see from the image below, the DDR2 notch is located near the middle of the RAM stick while the DDR3 notch is positioned nearer to the left side. They are of the same length (~13.3 cm or 5.25 in) and have the same number of pins (240): In terms of physical appearance, DDR2 vs DDR3 RAM looks largely similar. How to Tell If You Have a DDR2 or DDR3 RAM Module so let's learn what are the differences between DDR3 vs DDR2 RAM and how to tell them apart. If your computer was built in 2008 or earlier, then chances are that it has the older DDR2 RAM instead.Īt, we don't take chances or make guesses. To be more precise, its full technical name is DDR3 SDRAM. The RAM found in most modern desktop and laptop computers is DDR3 RAM (DDR3 is short for Double Data Rate Type 3). (voltage are written in the RAM Slot of Motherboard) DDR1 Volts – 2.5 v DDR 2 Volts – 1.8 v DDR3 Volts – 1.5 v DDR4 Volts – 1.2v.Ĭomputer abbreviations, DDR, DDR2, DDR4, GDDR, Memory, Memory termsĭDR2 vs DDR3 RAM - What's the difference between DDR2 and DDR3 memory? How do you tell them apart? Can you use DDR3 RAM in a DDR2 socket? Get the full answers right here. 
The voltage of RAM cannot be used for the Physical finding of RAM, but it can be used to place the RAM in the Motherboard Slot.
Currently, it is the most widely used type of RAM module for PCs as well as mobile devices such as laptops. DDR3, which stands for Double Data Rate type 3, is a type of RAM introduced in 2007. There is a slight difference between DDR3 and DDR3L in the specification as DDR3L is a special type of DDR3.Other than that, there's no difference between them. The highest quality ICs are tested for operating at 1.35 volts and are branded as DDR3L if they run properly. Manufacturers use the same integrated circuits for DDR3 and DDR3L. DDR3L modules are backwards compatible with DDR3 by design.
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