How to identify a ddr1, ddr2 and ddr3 memory?

Community
1

Hey folks,
I just wanted to know the general way of identifying the ddr, ddr2 and ddr3 memory types. I have to show which are what to others so can’t be using cpu-z program. I have to show them externally and there are no label on any of the memory. I know that ddr has 184 pins and ddr2/3 has 240. I found from youtube that there’s a mark at the end of the pin. So as I looked through the memory, I saw there was a number 93 written in memory which I told was ddr to some of my friends. And similarly ddr2 had 120 written so I said it was a ddr2 ram. I know its awkward but I need to know. Is there any way to find which memory is which? Thanks in advanced.

2

They have key notches in different places. Among the pins is a notch. Looking from the top side, the notch on the DDR2 lies slightly to the right of the middle point of the memory stick. On the DDR3, the notch is slightly to the left of the middle. http://en.wikipedia.org/wiki/File:Desktop_DDR_Memory_Comparison.svg

3

Notch locations: http://en.wikipedia.org/wiki/File:Desktop_DDR_Memory_Comparison.svg

You can usually identify the type of RAM it is by the speed rating on the label, if it doesn’t outright say the DDR type.

DDR: PC-1600 to PC-3200
DDR2: PC2-3200 to PC2-8500
DDR3: PC3-6400 to PC3-17000

If there is no label, you will have to google the model number printed on all of the chips.

4

So does it mean that my way of identifying is wrong? I did it because I thought it was way too easy and easy to find out which was which.

5

hey the rams have difference in the cuts over the ram that means the notches .It shows the difference over the ram

6

Thank you all. Found that ddr1 has written 184 at the end of the pin. 240 is written in ddr2 and ddr3. The way to differentiate ddr2 from ddr3 is the position of notches with ddr2 around the middle and ddr3 with notch more towards one end.