How to add more RAM on Lenevo S10. It just take 1.5 GB RAM. Can i change its Chipset to take more RAM like 3-4 GB ?

No, you cannot. It is the whole design of the motherboard that determines the max RAM, the chip-set is just one small part of it and besides the chip-set is soldered into the motherboard anyway and cannot be replaced. Stuart

Your 1.5 gb should be more than enough, unless you have some very special applications that require an enormous amount of RAM. More RAM does not 'automatically' speed up you machine. It only helps if you don't have enough to handle your current workload. If you do really need more RAM, you can free up some memory by trimming out the applications running in the background. Msconfig can help with that.

I don't know how you got 1.5 G to begin with. The only option is a 1G total memory. Playing to the angels Les Paul (1915-2009)