Rendering & Ram, How does Frequency, number of channels and capacity affect ray tracing in Blender?

A while back I made a video about testing a simple upgrade, making my 8GB DDR3 PC a 16GB DDR3 PC to test what the performance improvements were. You can watch that video right here. The video is just four minutes long, so it won't take you long to get the idea.

There were some comments I need to address though, I wasn't as thorough as I should have been in the tests.