Ok, the cpu cooler's type(downdraft) isn't adequate in this scenario.
There's a lack of side panel intake for it - not possible due to the glass panel, and the cooler has to deal with not just the cpu, but some of the exhaust from the gpu. Together, those 2 points are too much for the i71C.
Solution is a new cooler, either a tower air cooler or a 240mm or 360mm AIO.
Tower air cooler would be more affordable, but the clearance info that's needed is not provided, so you would have to find that out manually: measuring(millimeters) from the top of the cpu to the point the glass panel would be if it were closed.
Another option might be to return the PC? IDK. You shouldn't have to deal with this, but they went too low on the cpu cooler.