This PSU will fit in my case?

Solution
that is a standard atx psu m8, you will be fine to put your xfx in :)
just be sure the extra 30mm ( 170mm you said your xfx was long ) will fit and you will be good to go

Pondering

Honorable
Dec 7, 2013
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Fitting all the cables in the case will be rough though. You should go with the modular one instead.

ASUS-System-Unboxing.jpg