- Best Buy sold me two of the "1GB, DD2 SODIMM, F" sticks and they don't work in my laptop. I am also looking to find out what these are. My laptop should take 4GB DDR2 of RAM, but again these won't work and I even exchanged them for new ones. I have no idea how long ago this thread started since there is no year on it, but I'm posting this in 2010. Thanks!