Cool GTX
good read
Thread by GGTV-Jon
As with any other thing in the system if it's not bottlenecking, increasing the performance of it doesn't help much much for the performance of overall system. I.e. as oppossed to CPU+dGPU for many APUs memory speed matters significantly, increasing performance almost linearly as the memory is the one bottlenecking the performance. Also it depends which task is at hand, i.e. (de)compressing vs. gaming is a total different thing, so worth it or not depends on many factors. Generally speaking I wouldn't choose higher speed vs. more RAM for the same price, especially for productivity, but having quality stick i.e. 3200MHz at a reasonable price at 32GB that can be overclocked without issue are a good way to boost performance if RAM is the bottleneck. Usually it isn't, so gains are pretty low for most people.