Adding Memory

Col the first thing you need to find out mate is how much RAM that machine (motherboard will support. I have had a look and it is very difficult to track down just what it will. The only thing I can see is the higher end models for example the one that cost another $200 more than yours with the i7 comes with 16GB and the one above it 32GB. But it may be that the model you have will not take more than 8GB perhaps 16GB but you would need to find out - don't forget anything you do affects the warranty.

Well Col if you want as much as you can why not just add 2 x 4GB sticks if the budge t can stretch to it. If you do then try and get either a pair so they are more closely matched or 1 x 8GB stick.
Do you know what brand RAM you already have? If not use this

Using HW Info general components

Download HW Info andpick the right bit version - HWiNFO, HWiNFO32/64 - Download -(copy and paste this site into the search bar) If you do not need the runninginformation in the smaller right hand panel close it. In the left hand windowclick on the + for the individual device groupings and they will open out tothe various components.

Go on opening out furtheruntil you get to the device itself. click on it and it will highlight. In theright hand window there will be a very detailed description of that device asin brand, speeds model number etc etc These are very detailed and are just whatis needed for searching for drivers etc.

See my pic for anexample - in this I have opened out one my components and then highlighted one of the one you need andyou can see the detail.

Sorry mate misread that

So alls well then - enjoy!!