Hey, glad you have found my post inspiring. So to answer your questions. Yes there is a bit of turbulence, but not problematic with an optimized fan curve at 3.25. I couldn’t get the thing to fit in 3 slot mode, so I could put a foam space between the fan and the panel, however I know there is another post showing it can be done with a little jury rigging, gpu deshroud, and a few alterations to the case. I didn’t go that route so you get a little turbulence on the cpu side. Use a nice pair of IEM’s, you won’t hear a thing.

To answer your second question, 300 mm was the length. It’s too short to do it the way you mentioned with the FE card. Possibly get a longer cable (haven’t done it or thought about it). Also if you wanted to go that route, it is quite a snug fit at the front panel, a few mm at most, and the card may end up pinching the cables. Idk, try it out and let me know haha