This was introduced with an updated ASIO version that came out around the time of Cubase 7. Supposedly, it enhances audio stability in that it manages the priority of the ASIO threads in a way more compatible with Windows (7+) and should therefore help to achieve lower latency.
I haven’t been able to determine any difference, but I don’t have any extreme demands on either CPU-intensive plugins or latency (a buffer of 256 @ 44.1kHz is fine for me most of the time). Nevertheless I have it enabled, if as they claim, it enhances audio stability.
I suspect it will not be noticeable unless you are running your system at the extreme limit of its performance, which I suspect would be quite difficult given your current spec. To answer your question as to what you should test with, try DAWBench.
I’ll meet you back here in about 10 years, when you come back out of that rabbit hole.