Memory Brands
As the processor technology evolved in speed and bandwidth capacity, the industry also embraced the new standard in DIMMs. DIMMs range up to 4gigabytes (GB) per module and can be easily installed singly or in pairs. Most notebook computers use proprietary memory modules and other manufacturers use the SO-DIMMs configuration. Memory modules available today are very dependable. Cheap and brand-less or generic memory modules are the common cause of system failure. As cheap RAM probably can not handle overclocking features of the motherboard. So, it is practical to buy RAMs from the major manufacturers like, Crucial, PNY, Kingston, Samsung, Corsair, Transcend, etc.
DDR
Dual Data Rate (DDR) is one of the memory modules used in some legacy motherboards. DDR ram are twice as fast as SDRAM with regards to the data rate. Data rate refers to the number memory transfer per second. For DDR RAM’s PC3200 DDR 400 is up to now the most selling type of memory module being sold in the market. You can not replace DDR rams with SDRAMs due to their physical differences like the number of notches present on the memory modules. DDR RAM’s also have 184 pins unlike the SDRAM which have only about 168 pins. DDRs use another technique to transfer data that efficiently double the speed of the memory.
Here are some of the web sites that you can grab more information of the types of DDR RAM in the market: http://www.ddr-memory.com/
DDR2
Double Data Rate 2 (DDR2) the most common type of RAM used in current and the latest PC’s. It has a faster data rate compared to DDR chips. Similar to SDRAMs, DDR2 stores memory in a memory cell that are activated with a clock signal., DDR2 chips typically operates at 1.8 volts which have lower power consumption compared to DDR chips. This new type of memory was presented in the market in support for the Intel’s LGA 775 microprocessor socket and with the chipset manufacturers including support for AMD’s AM2 motherboards. Even though DDR2 memories are are already supported on the latest motherboards, DDR2 DIMMS are note backward compatible with DDR RAMs .