Hi everyone, i have an old laptop that runs on Pentium 4-m 1.80 Ghz, an IBM r40E to be exact, I was thinking of upgrading my memory as it only runs at DDR1 256mb, I went to check out some sites who would probably sell me some RAM, it seems that I cant find one that could run under PC2100 at 266 mhz which apparently that's what's specified by IBM tech support, instead I found 512 mb and 1 Gb at DDR1 333 or 400 PC 2700, do you think this would work if i replace my old RAM to this higher speeds of RAM, I tried researching on LENOVO website but it does not say anything about going higher than 266 mhz would be ok, so what do you think guys any opinion on this matter?