memory - How can I determine the fastest RAM I can put in my laptop ?

I would like to add some RAM to my laptop but I have one small problem: I would like to know what is the fastest speed I can put inside it.

I know from CPU-Z that I use DDR3 RAM:

One piece of RAM is PC3-10700 (667 Mhz) and the other is PC3-8500F (533 Mhz)

I use Acer Travel Mate 5742G if that's relevant. My Chipset is Intel Havendale/Clarkdale Host Bridge.

Answer

You laptop will take up to 8GB and the fastest speed it will take is DDR3 PC3-10600 .
You can buy it here >> http://www.crucial.com/store/mpartspecs.aspx?mtbpoid=E5A23A8EA5CA7304