Hello there.

I remixed the original Atlas Lamp by nohojjjen to be a GPU Support.
I dont know if it does what it is supposed to to in closed cases with air cooling, I for myself printed it in regular PLA+ with 25% infill, since i dont have temperature issues. But since it can get quite toasty in some cases i recommend using a more heat resistant material, especially with heavy GPUs.

Obviously you have to resize it in your slicer to fit your individual GPU.

I Edited the stl in blender (poorly cuz no skill) and the neck looks quite rough in the stl. When its printed you barely notice it though.

Creality

Ender 3

Yes

25

Choose your material based on the conditions the support rests in. PLA in warmer conditions can get pretty wobbly and not supporting at all.