Upgrading your laptop memory is almost always a good idea. You'll speed up your computer and you will also be able to multi-task with different programs loaded at the same time. There are a few points to keep in mind, however, when you upgrade your computer memory. Clock speed, memory size, and form factor are all important considerations, not to mention that RAM memory is very sensitive to electrostatic discharge, such as built up static electricity (laptops are almost always more sensitive to ESD than desktops for some reason).
How much RAM do you need? 1GB should be sufficient for most tasks, although 2GB or even 4GB of RAM will do the best job if you handle graphics-intensive activities like design or video games. RAM is known as volatile memory which means it does not store any data when the power is turned off.
If your computer is continually loading programs into the page file you may need more RAM. Dynamic RAM (DRAM) typically comes in a DIMM package which stands for Dual inline memory module (DIMM). Each PC or laptop takes just one kind of DIMM so you need to know your type in order to upgrade your memory. All motherboards are built to handle different capacities of RAM.
DDR SDRAM became industry standard about 2003. Stands for Double Data Rate Synchronous Dynamic random Access Memory. Who says English isn't a more than a little like German in terms of chaining words together?
DDR SRAM for laptops is either 172-pin micro-DIMMs or 200-pin SO-DIMMS. All laptops now provide good access to their SO-DIMMS for RAM upgrades - once you lift the panel, separate the retaining clips and remove the pins
About latency, CL2 is going to be faster than CL3 because it responds more quickly to the CPU.
