There are 240 pins on DDR2 and DDR3.
686 pins
240
240
6they guy who writ this is a . t . w . a . t ., the answer is 240!!!
count them
ddr1 184 pins ddr2 240 pins ddr3 240 pins there are 240 pins one side 120 pins and other side 120 pins so 120+120 = 240 pins in ddr2 ram. as well as ddr3 has 240 pins and ddr1 has 184 pins only . by Prem verma from www.prem-verma.blogspot.com
2.66" 200-pin SO-DIMM contains DDR2 SDRAM. One notch is near the side of the module.
240
All DDR chips have 184 pins while DDR2 have 240 pins
For server and high end stations nimber of pins are 240. For Laptop and Cube PC it is 214. (Refer Simmtester.com-Publications)
Here's what I found out for you. The DDR3 has 240 pins just like the DDR2, however, they will not be compatible, you will not be able to put a DDR3 into a DDR2 slot. The knotch on the stick of RAM is in a different location so it will not fit. So a new motherboard made for DDR3 will have to be used. They are currently out on the MAC Lite computers but not sure if Microsoft has any on the market yet. The DDR3 will use 1.5V, which is lower than the DDR2 1.8V.
Types of DIMMs are DDR3 and DDR2 that have 240 pins, DDR DIMMs with 184 pins and SDRAM DIMMs with 168 pins.