MSI Ventus 3080 only?
Yes and no. Yes because this is designed to hug the Ventus' radiators as snugly as possible, so unless other cards are of the exact same height post de-shroud, this would either be too tall / short. On the other hand, the ventus 3080, 3080Ti & 3090 from MSI all shares the same cooler so technically this also supports the Ventus 3080Ti & the 3090.
Arctic P12 only?
The fan shrouds included in this listing here will only fit the Arctic P12, however I've created new ones for the Noctua NF Series (NF-A/S/F12) & Generic 120mm Fans.
How to mount?
There are 3 ways to mount the shrouds to your P12s and they will require you to print different models:
Bracket with Logo?
If you choose the 3rd mounting method, you can choose to print 1-2 P12-Bracket-RTX_Logo.stl instead of the normal variety, these are special brackets that have "GEFORCE RTX" embossed on it and looks quite cool!
Arctic P12 model used in rendering by C. L. (Adapted)
Heatsink model used in rendering by HDRI (Adapted)
The author hasn't provided the model origin yet.