No.

Intel Xeon E3-1230 @ 3.20GHz. Class: Server. Socket: LGA1155

optiplex 3020 socket LGA1150

I also ran across semi-duplicate post:  https://www.dell.com/community/Optiplex-Desktops/what-is-the-best-processor-upgrade-for-a-dell-optiplex-3020/m-p/7558742#M41869 

don’t they both have the same socket tho?

LGA1150 and LGA1155 are not the same socket or socket type.

If you're interested in the top CPU's for your 3020, please see screengrab below.  I saved a borrowed post so I could keep track.

Image will appear when approved by a moderator: