|Probably this one:|
You should be able to enlarge the image on both links if it will help. Gigabyte should have a tech help link on the site as well if you need it.
For gaming you probably do not need more than 16GB of memory.
To install the memory you open the case.
Ground yourself on the side of the case or a metal light switch cover screw.
Unplug the computer.
Turn the computer on its side.
Locate the open memory slots.
If you need to move any wires out of the way, do so gently.
Move the tabs on the end of the sockets outward.
** If your heat sink or one of your graphics cards blocks one of the sockets, stop and do not bother **
Orient the memory so that the notch aligns with the tab in the slot.
Press the memory straight into the slot evenly on both sides until the end tabs click into the ends of the memory. If one of these do not completely engage, then press that side a bit more. If it does not fully seat without extreme force, push the tabs out and remove the memory. Recheck the size of the memory and location and orientation of the notch. Never force it in. It will take a fair amount of pressure but you do not want to break the memory, socket, or motherboard by putting too much force or letting it twist as it goes in.
You have to be a little bit crazy to keep you from going insane.