I designed these brackets to mount a Gigabyte Aero Geforce RTX 4090 in a Hyte Y60 case. The standard vertical mounting position for this case will leave the RTX 4090's fans pressed very close to the glass, which restricts airflow. This bracket tilts the GPU 15 degrees back, which leaves much more clearance for the fans.
This solution looks nice and provides good airflow to the GPU. It also provides sturdy support. There are some downsides though. The brackets block all of the remaining PCIe expansion slots (I wasn't planning on using those). It is also a lot of work to install. I had to cut away some of the cutout slots in the back of the case with a Dremel to accommodate the now tilted card.
The author marked this model as their own original creation.