The Dell OptiPlex 5000 SFF recommends T-series CPUs for its tight thermal envelope

The 5000 SFF runs an LGA 1200 socket with 11th Gen Intel processors from i3 through i9. Dell recommends T-series (low-power) variants for the SFF chassis’s thermal design, though standard 65W parts will work. This generation also includes Celeron and Pentium options for budget builds — useful to know if you’re speccing one out for a basic office machine.