Can any one tell what are the different types of RAM are there, what does the values like PC 333 or 2100 mean

Question

And how to know what type of RAM will be compatible to what motherboard?

Answer 1

Here's a good explanation of Ram
http://www.tech-faq.com/ram.shtml

If you go to the site below, you can plug in a few system specs to see if your computer can handle more RAM
http://www.crucial.com/index.asp

Answer 2

There are two types to differenciate RAM, first is the type, and second is the speed.

Examples of types are :

DRAM or Dynamic RAM
EDO RAM or Extended Data Out DRAM
XDR DRAM
RDRAM or Rambus DRAM
SDRAM or Single Data Rate Synchronous DRAM
DDR SDRAM or Double Data Rate Synchronous DRAM

Speed types are differentiated by the speed by which the RAM runs.

So for RAM speed, the bigger the PC-xxxx thing, the faster it is. For example, a PC-4300 RAM will be faster than a PC-4200 RAM.

Lastly, to know what kind of RAM will be compatible on your motherboard, you need to know what kind of RAM your motherboard uses. You can consult your motherboard manufacturer's website for that, OR just read your motherboard manual.

Answer 3

The number refers to the RAM frequency. Generally a higher frequency indicates a higher performance (and cost) .

There are many types of RAM SD, DDR ,DDR2 and RD RAM.

Answer 4

There are tons of different types of ram.

The numbers usually refer to speed, and then there are different configurations - different numbers of pins, etc.

Always make sure to look up the motherboard online if you aren't sure of what kind of ram to use.

Answer 5

SDRAM- 168 pins w/ 2 notches:
http://en.wikipedia.org/wiki/SDRAM
DDR-SDRAM- 184 pins w/ single notch. Please refer to stick/module specification:
http://en.wikipedia.org/wiki/DDR_SDRAM
DDR2-SDRAM- 240 pins w/ single notch.
http://en.wikipedia.org/wiki/DDR2_SDRAM