He does say exactly what I said at 5:40.
But, it is interesting that his motherboard temps didn't increase too much.
And I appreciate him pointing out that your open case will be a dust magnet. I really appreciate the filters on my case, that I can just remove and blow out. I also live in Colorado.
I had to do some work on my server over the weekend, and I was surprised how clean the internal components were, and also how dirty the filters were (which were easy to clean).