An array of SD -RAM First thing to consider : laptops do not use the same bars as desktop PCs . While the format DIMM is normally used on a PC, mobile phones are equipped with SO-DIMM ( Small Outline DIMM ) or MicroDIMM , which are smaller sizes . Be careful not to be mistaken for purchase . Note that the models that use MicroDIMM are very rare, format SO- DIMM is much more common . Note found several formats: the SO - DIMM 144- pins for SDRAM , 200 pins for the DDR and DDR2 and 204 pins for DDR3.
DDR , DDR2 or DDR3 ?Like desktop PCs, laptops used different memory technologies . Depending on the age of your laptop , then it will use DDR ( Pentium - M, for example), DDR2 (Core Duo , Core 2 Duo) or DDR3 (Core 2 Duo) . Be aware that some generations have the opportunity to receive one or the other: a machine with an i915 chipset ( Sonoma) can for example use DDR or DDR2 (at the discretion of the manufacturer) .
Kingston - Memory - 2 GB - SO DIMM 200-pin - DDR2 - 667 MHz / PC2-5300 - unbuffered - non-ECC
Beware frequencyThe DDR MicroDIMM -The memory frequency is important: Laptops are more sensitive to this issue than the desktop . In practice , it is advisable to use a memory slower than the PC application, on pain of not being able to start ( the DDR2 -533 instead of DDR2 - 667, for example) . By cons , use memory faster than the machine is waiting poses no problems: DDR2- 800 on a machine that requires DDR2 -667 works perfectly .
Dual Channel ? Important in some casesThe Dual Channel is an important technology in laptops , especially if your machine is equipped with an IGP : it increases the bandwidth and hence the performance of the graphics using two memory modules in parallel. To take advantage of Dual Channel , it usually takes two identical bars ( capacity and frequency ) . If your machine is equipped with a real graphics card with a good amount of dedicated memory ( at least 256 MB ) Dual Channel has little interest in all other cases , it is almost mandatory if you do not want to see performance 3D collapse.
How to change the memory ?On most laptops , the memory is accessed via a trap door under the laptop . It is often enough to remove one or two screws to access the memory . Note the insertion of memory does not function as a PC : it must be placed at an angle of 45 degrees to the connector and then you have to push it to fix it into place.