I am refurbing my son's "old" Dell (I know, I know) for the ol' lady and all went well until it came time to check my RAM numbers. At boot the BIOS reads all 768 mb (1-512 and 1-256) but the Control panel-System displays a number that 1-seems to change and 2-reflects a much smaller quantity. Should I be concerned? Just on a lark, I tried Bel-Arc Advisor and again got a small (274 mb) number. Bel-Arc did reflect the 2 sticks and their respective sizes Before I go to pulling sticks and tracking serial numbers Which is correct???? Thanks for your time.