Micro and SFF aren't the same.  Micro has no slots for expansion cards.  Luna indicated micro. PSU for 3080 micro is 65w and 200w for the SFF. 3080 spec sheet attached below.
Hi, I want to know if can I put a ASUS Dual Radeon RX 6500 XT on a dell optplex 3080 micro, I want to know if fit  because I want to buy a that Graphic card but I don´t know to much about computers. Wait for his anwsers.[IMAGE]
Can I put a ASUS Dual Radeon Rx 6500 XT on a dell optplex 3080 micro?