GPU modder shows dual slot Nvidia GeForce RTX 4080 is possible
will a gt 8800 fit in optiplex 780 MT | Tom's Hardware Forum
Graphics Card|GIGABYTE|NVIDIA GeForce RTX 4070 Ti|12 GB|GDDR6X|192 bit – W-Warehouse
Amazon.com: upHere Graphics Card GPU Brace Support Video Card Sag Holder/Holster Bracket, Anodized Aerospace Aluminum, Single or Dual Slot Cards (Black),GL05(not Support 3080 ti) : Electronics