How to add fan to 3090 GPU back plate

[Crypt0Gore]

For those using 3090 graphic cards how can one add a fan to the GPU backplate? Also which type of fan are you using for this modification that works smoothly?

[philipma1957]

For those using 3090 graphic cards how can one add a fan to the GPU backplate? Also which type of fan are you using for this modification that works smoothly?

depends on the case. is it a standard pc with 1 card?

is it an open case with a few cards on risers?

[Pterosaur]

It will be more easier to add a fan if the GPU is just one and inside a desktop PC or a gaming pc but if the GPU is more than one then I don't know how to handle this.