Leftover parts and frankenstein'd this cable mess.

Dell Optiplex 7040 SFF Intel Core i5-6500, 16GB Ram, 1TB Gen3 Sabrent m.2

RTX 3080 12gb
https://www.amazon.com/dp/B089FL86GS Proprietary Converter

https://preview.redd.it/04cfo9fqh6xg1.png?width=1152&format=png&auto=webp&s=511e49358db2342e66851e6fc8df525ffbf2237b