Hydropothecary announces expansion plans to increase production capacity to 108,000 kilograms per year of dried cannabis
4 gb of ram is so much. 8 GB is definitely overkill unless you are planning on doing something involving video. With ableton you would actually be fine with 1 or 2 gb, 4 gb is plenty.
Depends on how many free slots you have available. If there is no room for expansion, you have to throw away your current RAM and buy a full set of 8GB RAM. If there are free slots for RAM, you need to purchase only 4GB, but that should exactly match the RAM you currently have.