Hello im looking for a GPU upgrade on my Dell XPS 8930.

I was Looking for an Asus 5060 but it recently went out of stock,
I have a 750w PSU 16GB RAM and a GTX 1070 along with a I7 8700 

the gpu im now looking for is an ASUS ROG STRIX RTX 3070 or any other 3070 

I brought the pc to a specialist and he said he isnt sure if anything else would work -_-

Most will fit lenght and width but im not sure about the cleareance with the power supply?

Any tips?