which ram slots do i use

Hello,   I'm the owner of a HP Pavilion Elite HPE 010be desktopcomputer . It contains the following motherboard: http://support.hp.com/us-en/document/c01972272   I want to upgrade the RAM memory of the PC, but i can't find anywhere which of the 4 slots are for dual channel use. Do I put the new ram ...

Does dual-channel mean I can only use two sticks? What do multiple channels do that one channel doesn’t? Can I use quad-channel RAM on a dual-channel motherboard.

I tried to use the CPU-Z utility to determine the number of RAM slots available in the laptops. You can download the Windows version of check the details of RAM slots.