Can I replace the motherboard in a Dell Optiplex 780 mini tower?

[motojax2002]

I want to upgrade my motherboard so I can put a better cpu in it and have a better pcie slot so my graphics card will run as good as possible.

 

[Jwpanz]

Not really. Dell uses OEM parts for their systems and not standard ATX form factors. If you did some modding to the case you could get something like a mATX board in there but that would require drilling and other modifications.

 

[Calvin7]

That model uses an obsolete BTX form factor size. Read more about it here:
https://en.wikipedia.org/wiki/BTX_(form_factor)

I suggest you buy an inexpensive bare PC case from a retailer. The mid-tower is a popular size. A mini-tower fits micro-ATX mobos, while mid-tower fits larger ATX sizes too.
https://www.newegg.com/Computer-Cases/SubCategory/ID-7

 

[william p]

The Optiplex 780 has the potential to run a Q9650, 16GB DDR3 RAM, and a Zotac GTX1050Ti 4GB Mini video card (others don't fit w/o modding). If you want more than that then you need a different computer. You can put a bigger PSU in the Mini Tower, and modify an ITX video card to fit. Avoid newer AMD cards R9-3xx ,285 and up. A little case modding and you could have a GTX 1060 in there. As far as LGA775 Optiplexes go the 780 is as good as it gets.