• DDR does everything better than SDRAM.ram 3 image by PeteG from Fotolia.com
  
  SDRAM is an obsolete type of RAM that dominated the computer memory market during the 1990s and early 2000s, according to Karbos Guide. If you still have some of this old RAM, it may still serve some purposes that DDR RAM cannot, because SDRAM uses a different form factor than other classes of memory.
  
  

Good for Old Computers

• RAM modules are only interchangeable if in the same class. You cannot, for example, use DDR RAM on a motherboard designed for SDRAM, according to PC Buyer Beware. You can still use your old computer with SDRAM for very simple functions, such as a server for a website with few users or as a computer for a child.
  
  

Cheaper

• The largest sticks of SDRAM cost only a few dollars as of October 2010 and provide comparable speeds on computers with less than a 1 gigahertz processor, according to RealWorldTech.com. The benefits of DDR RAM increase with processor speed, because processors need a larger amount of memory bandwidth as their processing power increases.
  
  

Tip

• If you do not use any memory-intensive applications, such as graphics processing or video games, you can save a little money by sticking with SDRAM, suggests ExtremeTech.com.
  
  Schools, especially in economically distressed areas, tend to use outdated computers. Call your local schools to see if they could use any donated SDRAM to upgrade their computers.