I don't know much about the case he used, but my fractal design node 304 case has absolutely zero air flow problems (despite no exhaust vents along the top of the case which in turn traps heat) and is floor-noise quiet with medium fans. My old open-air GTX 780 never got above 75 C during the summer. My current OC'd 980 doesn't breach 70 C with any noticeable fan noise.
I am keeping my eye on the Dan A4 SFX, and I am extremely confident that if I end up getting one there will be absolutely zero air flow or temperature issues running any kind of video card inside that case, and it'll be the smallest case in the world that can house a full-sized graphics card.
EDIT: Waiting for someone to tell me that my post is heavy on claims and light on proof.
He was using a Silverstone Sugo 13, which is pretty similar to the Sugo 05. In any event, all of the Sugo line have poor airflow unless you properly set them up, even then they tend to run hotter than other mitx alternatives.
As soon as Silverstone releases the 700watt SFX-L you will be able to fit an AIO cooled overclocked i7 quad core and a fury X2 in an Ncase M1, which is just a little bit bigger than the Sugo 13.
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