This forum post should help. Pay particular attention to the post by [NAME] .
My Optiplex 790 has an i5-2500 CPU in it What can i upgrade it to its form factor is a regular desktop (NOT SFF) Example image included Full Specs i5-2500 CPU 16 GB Ram AMD Radeon HD 7450 GPU 120 GB PNY SSD Seagate Constellation 1TB HDD Built-In Ethernet Connection Only [IMAGE]
Optiplex 790 Tower PC CPU Upgrade