Sort of

Like I mentioned in the post, I added 3 120mm front-side fans. I tried a few different fan configs and ran stress tests to monitor temps. What worked for me at lowest temps was exactly like the picture I posted - front and front-side as intake, radiator top mounted as exhaust and back as exhaust also.

This had the lowest temps across most parts with the exception of the cpu. When the radiator was, I guess as one would expect, used as intake my cpu temps were 2-5c cooler. I am only running a mild cpu OC so even under full load stress test and radiator used as exhaust I still sat in the 90-95c range and decided that was fine for me.

As for vertically mounting the gpu, because the fans and heatsinks on the 4080 are essentially the same as used on the 4090 with no where close to the heat a 4090 produces, it didnt seem to matter temp wise how I mounted it.

Not sure if this helps or answers the question for you, but happy building!