Yes, you can install an Xeon E3 1220 v2 processor on a Dell OptiPlex 3010.
Yes, you can install an Xeon E3 1220 v2 processor on a Dell OptiPlex 3010.
Sure, you can upgrade your i3 2100 to a compatible xeon e3 1220 processor. Just check compatibility and ensure the new CPU fits your motherboard.
Update your BIOS first, verify your CPU cooler is adequate, and then replace the CPUs.