RAM doesnt get infected, the ROM on your Mobo can but only by really old viruses. Mainly they just email off to other people. Some of the older ones wiped your hard drive and such, but not so common anymore.
Ram actually can be infected... it works like in your harddisk... as long as your machine has power, data can be kept in the ram. (virus will be kept in there too!) but after you restarted your system, everything will be gone... but if you have the virus start up with your machine.. then you will always have it... to clean it is easy... just use a virus scan... you know when you scan your system it will scan your memory first... that will clean it if it's there.... Good Luck..
Ep, glad to see you come back and tidy up...did want to ask a one day favor, I want to enhance my resume , was hoping you could make me administrator for a day, if so, take me right off since I won't be here to do anything, and don't know the slightest about the board, but it would be nice putting "served administrator osnn", if can do, THANKS