Insert the first stick of Ram in memory slot one, reconnect the power and in the case of a desktop computer the video to screen cable.
Power up the computer and see how it goes.
Make a note of the results.
Repeat the procedure until the first stick of Ram has been tested in each memory slot and the results written down.
Remove the first stick of Ram and put it to one side on top of a piece of paper with the number one on it for identification purposes.
Repeat the procedure with all Ram until each stick has been tested in all slots, the results written down and the sticks identified numerically.
Thanks for the Speccy url
From the information shown at the url that you have provided I note that the Ram is the dual channel type, this type of Ram is best used in matching pairs as it is more stable, your MB just may not like having an odd stick in slot 3.
How the notebook behaves with Ram in slots 2 and 4 depends on whether there must be Ram in slot 1 for the notebook to boot BTW.