Computers attract memory to perform algebraic operations. Over the long term, this memory is stored on the hard drive, but when you're PC is on, it uses a form of short-term recall called Random Access Memory. All desktop PC have RAM and so do notebook computer, though notebook RAM tends to be smaller to fit in a smaller device. It can be install relatively easily by a trained technician. It comes in varying capacities, speeds and creation that will affect your computer performance.

DDR SDRAM

• RAM became small enough for notebooks with Double Data Rate synchronous dynamic casual access memory or DDR SDRAM, which was nearer and could be made minor than regular SDRAM found in desktop computers. It appeared in 2000 and came in varying sizes such as 512 MB or 1 GB with varying speeds up to 333 MHz. The capacity of RAM, combined with its clock speed, conclude how much memory it can hold and how fast it can retrieve it. DDR2 SDRAM succeeded DDR SDRAM.

DDR2 SDRAM

• DDR2 SDRAM is double as fast and DDR SDRAM due to tweaks to the time of the memory stick. DDR2 came out commercially in 2003, and is a very popular usual type of notebook RAM. A 2 GB capacity running at 667 MHz costs $43.99 on
Amazon.com.

DDR3 SDRAM

• DDR3 SDRAM is twice as fast as DDR2 and can be as big as 8 GB per module. Since most notebooks have two slots, users can mount up to 16GB of RAM if the slot can support it. DDR3 came out in 2007 and two, 2GB firewood that runs at a brisk 1066 MHz costs $96. It's the fastest RAM on the market.

DDR4 SDRAM

• DDR4 SDRAM will succeed DDR3 and should come out in 2012, with preliminary speeds of 1600 MHz, which is closer than any RAM out there now. Speeds could rise to 3.2 GHz, blindingly fast for RAM.

RAM Makers

• RAM is made my several manufacturer, the most trendy consist of Kingston, PNY and Crucial.