It’s clear from my growing experience that I need to upgrade my system to get processing results in a reasonable amount of time. I’m currently using a windows system with an i5-4690k @ 3.5ghz with 16gb of memory and an AMD R9 290 graphics card. Increasing memory to 32gb is a must, but which would give me a better performance boost, adding another graphics card or replacing the CPU with say an i7-4790 4ghz.