Summary

Graphics cards get HOT. I didn't want my vents blocked by the original thing, so I added a cutout to make it as minimal as possible. I also shrunk the dimensions of the printed part to be 2.21mm thick - which is exactly 5 lines printed at 0.44mm line width. It worked brilliantly on my PC - except that the HDMI port is high up and near to the case bracket. I created a spacer that you can adjust the height of in the slicer and glue on with super-glue if you have a similar issue to me

In the process I created one without the cutout that is incredibly easy to print. I didn't bother using supports for any of my prints. You just need to make sure it's in the same orientation as in my photo.

My cable was a nice tight fit. If it's too tight for yours, you can just enlarge it a percentage or two in the slicer.

This is an airflow version of the original thing as well as this rectangular one as I created it before realising I had a rectangular cable (pretty much all of my HDMI cables are actually.