Im not good with computerss, qu about GB.......?

GB(gigabyte) is a unit of measure for memory. A 640GB hard drive means you have 640GB of storage space. 6GB of memory means 6GB of RAM(Random Access Memory). The more RAM you have the faster the computer will run. To learn more about computers you can go to google and search terms you don't know or ask people who know(me) they'll be glad to help.