I just got my computer, HP Z400, looking at some upgrades for it.
Currently has only a rear chassis fan and I would like to add a front one.
There is a 4-pin plug on the MB for a front chassis fan (it's even labeled that way on the diagram on the inside of the case cover), so I got that covered, but how do you attach the fan to the case? There don't appear to be any threaded inserts or really even fan mounting holes at all. There is a large open grid and some random holes but nothing resembling a fan mounting pattern.