ram for M61PME-S2P motherboard

Bellero

Honorable
Jul 22, 2013
4
0
10,510
I am trying to buy extra ram for my motherboard. However some things are not so clear to me:
does it matter how many pins the ramstick has?
which types of dimm memory are compatible with it?
here's the manufactures site and model specification. it doesn't include number of pins or type of dimm memory though.
http://ee.gigabyte.com/products/page/mb/ga-m61pme-s2p_10/