Since we are in the motherboard category, I'm going to assume it is the usual reference to a Ram Memory module.An average example of a Ram Memory module, as used in a desktop computer. Also known as a 'stick' of Ram Memory,
http://en.wikipedia.org/wiki/File:Generic_DDR_Memory_%28Xytram%29.jpgFor additional questions please post in a Comment.Regards,joecoolvetteTo add;1)
http://computer.howstuffworks.com/Scroll down to the subheadings under the Orange(?)heading - What's Inside: Computer, ,and click on one at a time,Computer HardwareComputer PeripheralsComputer SecurityComputer SoftwareInternet2)
http://www.hardwaresecrets.com/Go to the top header, and click on one at a time,CaseCoolingCPUInputMemoryMobileMotherboard, etc.