hi, ive just order the new macbook and have been looking at RAM on crucial.com for choosing the right memory to buy. i used the "Crucial Memory Advisor tool" to find to find "!guaranteed"-compatible memory for my macbook. For model, i selected "macbook 2.4GHz intel core 2 duo (13" - white)" which it seems fits the description on the apple website at the moment and it reccommended this below.. "4GB kit (2GBx2), 200-pin SODIMM, DDR2 PC2-5300 memory module"- http://www.crucial.com/uk/store/mpartspecs.aspx?mtbpoid=AE706D07A5CA7304 but the apple website says "MacBook uses one of the fastest memory technologies available today 1066MHz Double Data Rate (DDR3), "1066MHz DDR3 SDRAM" - http://store.apple.com/uk/configure/MC516B/A?mco=MTc4OTE2OTA so my question is is there much difference between DDR2 and DDR3 RAM and am i better off trying to find a site that sells DDR3 RAM instead of going with what Crucial reccommended? Thanks in advance to anyone who could help me with this..... Cheers!