Dear Friend i have this Laptop Toshiba Satellite A105-S2713 (Pentium M 740 1.73 GHz, 512 MB RAM, 60 GB HDD) Speed 533 MHZ Max Ram suported is 2GB (I have buy recently 2 Rams 1Gb+ 1Gb = 2Gb 2Rx16 PC2-6400S -666-12) Before that on my laptop there were 512mb 2Rx16 Pc2-4200S-444-12 So, My Question is that 1Gb+ 1Gb = 2Gb 2Rx16 PC2-6400S -666-12 Works on my Laptop plz help any one