I want to upgrade the memory in my computer form 512 to 1 gig. My current mobo and cpu support upto pc2100. WHat happens if I put in, lets say, pc3200? Will that ram just run at the lower speed? Or will it not work at all. I don't want to buy a gig of pc2100, cause I know that at some point I will upgrade my mobo and proc to something much faster that would probably support faster ram.