This memory kit is consist of two identical 2GB memory modules.
DDR2 memory can operate the external data bus twice as fast as DDR SDRAM. In order to take advantage of this, you need to use two same type memory modules, install them in pair.
DDR2-667 SO-DIMM Kit- 4GB (4096 MB, 2 GB x 2)
CL=5, UNBUFFERED, NON-ECC,
Note: How much memory your Windows OS will recognize depends on which version of Windows you are running. 32-bit versions of Windows will see (and utilize) only 3GB or 3.5GB. To utilize more memory, you need to install a 64-bit version of your OS.
Note: Actual product(s) may not look exactly same as the picture(s) because of fast changing of the computer industry.
Please use our Laptop/Notebook Upgrade Guide to find right memory modules by the laptop computer brand & model.