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.
In your specific case, 8 GB is due to your motherboard not supporting any more than that amount of RAM. But Ubuntu itself supports 4 GB max for 32 bit, 64 GB on 32-bit PAE and 128 GB on 64 bit (although theoretically the cap is much higher for 64 bit).