This is a 3 place GPU holder for a mining rig. Everything is made to fit together with the provided push pins. You can use this rig with or without the 120mm fan holders.

I would not suggest doing this item in white. The shrinkage of white makes the 120mm fan holder an extremely tight fit. Doable, but tight.

I suggest holding the GPU's to the crossbar with zip ties. I placed a slot to run the zip tie through so it will not interfere with the fan bracket.

Adjust your layer height to fit your needs for your quality of print. I use a .8 mm nozzle.

To Avoid Supports:

Flip the pushpins on their tops so no supports are needed. Lay the fan holder down on its face so the legs are sticking up in the air

Kingwin 120mm Silent Fan for Computer Cases, Mining Rig

https://www.amazon.com/gp/product/B002YFP8BK/ref=ppx_yo_dt_b_asin_image_o01_s00?ie=UTF8&psc=1