It all depends on your motherboard / Chipset, if its dual/triple or quad channel, however, if you only have four slots then you are most likely to have dual channel memory, and therefore they need to be matched in pairs - however, you will need to check your manual for you particular board -
I am just curious how you decided that the price was to good to refuse - given you clearly have no idea of what you "bought"?
read the manual or look at the two existing ram sticks - what type/speed and then get double the size in pairs! and that is if your motherboard supports that quantity of ram
all the best - hope this helps
Hi, Happy new year when it arrives for you.
I just upgraded with two sticks of 4GB RAM and now for a price I could not refuse I bought another one stick of 8GB RAM of the same make.
What I don't no is how to place them in the 4 slots, I no that if you have for example 2 X 2 GB and 2 X 4 GB you have to place 2-4-2-4 but I only have the one stick of 8GB and two 4 GB total 3 sticks 16 GB how should they be placed?