Hi, Paulo:
Below is the link to the service manual for your notebook.
http://h10032.www1.hp.com/ctg/Manual/c01951704.pdf
Supported processors can be found in Chapter 1, page 1.
Your notebook has the Mobile Intel 965 chipset. Theoretically, you can install 2 x 4 GB of PC2-6400 memory for a total of 8 GB.
You need to be running a 64 bit operating system for 8 GB of memory to be of any use to you.
See this post below regarding the possibility of doing so.
http://h30434.www3.hp.com/t5/Notebook-Hardware/The-dv6700z-And-dv9700z-WILL-Support-Over-4gb-of-RAM/...
Paul
