You are selecting memory to put in to a laptop. Which of the following types of RAM chips would
you most likely select?

A.
144 PIN

B.
72 PIN

C.
240 PIN

D.
184 PIN

Explanation:
Both MicroDIMM and SO-DIMM come in a 144 pin configuration, and are used for laptops.
What is SO-DIMM?
Small Outline Dual Inline Memory Module (SO-DIMM) is a type of memory module that comes in 72
pins and 144 pins. The 72-pin SO-DIMM supports 32-bit transfers, and the 144-pin SO-DIMM
supports 64-bit transfers. It was introduced for laptops. SO-DIMMs come in smaller packages,
consume lesser power, but are more expensive than DIMMs.
Answer option B is incorrect. The 72-pin is a legacy chip used in PC’s.
Answer option D is incorrect. The 184-pin is used in DDR RAM in PC’s.
Answer option C is incorrect. The 240-pin is used in DDR2 and DDR3 RAM in PC’s.
What is DDR3 SDRAM?
DDR3 SDRAM or double-data-rate three synchronous dynamic random access memory is a random
access memory interface technology used for high bandwidth storage of the working data of a
computer or other digital electronic devices. DDR3 is part of the SDRAM family of technologies and is
one of the many DRAM implementations.
DDR3 SDRAM is an improvement over its predecessor, DDR2 SDRAM, and the two are not
compatible. The primary benefit of DDR3 is the ability to transfer at twice the data rate of DDR2,
thus enabling higher bus rates and higher peak rates than earlier memory technologies. DDR3
memory power consumption is 30% less as compared to DDR2 modules.
Reference:
http://en.wikipedia.org/wiki/SODIMM