16GB RAM Upgrade Complete. I replaced the two 4GB modules with 8GB.
Kingston HyperX Impact Black 16GB Kit (2x8GB) 1600MHz DDR3L CL9 SODIMM 1.35V Laptop Memory (HX316LS9IBK2/16)
It's too early to tell if there is an improvement. And if there is, it's marginal at best. But, I upgraded just to see if anything would happen. And, it was fun, while it lasted.