Yes here's another way to see the DX11 goodies your card can produce..
When running, pressing enter, starts the benchmark.
F1 to F5 changes parameters like wireframe and Tesselation. Also numbers 1 to 5 produce varied still views. When the benchmark isn't running one can 'fly' using the W,S,A,D keys.
Hmm .... no problem, actually it don't matter if this is 300 or 400, it's just me being curious do you mean the full version is as large as 300 - 400 GYGABYTES ? Or megabytes ? Cause I know there are videos that large.
(I can't find the home page with the full version so quickly, so I can check the size)
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For the rest, it's a great demo working like a charm.