Re: is it possible to upgrade the CPU from a 4th Gen to a newer, more up-to-date CPU, or, would I also have to update my motherboard too yes you would need to update motherboard to support a cpu to run Windows 11.  cpu needs to be at least Intel 8th gen or equivalent level.  there is no Dell optiplex motherboard that can fit 9020 case because modern optiplex (and other Dell desktop model) motherboard has become highly proprietary.  your option includes non-Dell microATX board with 300 series chipset or higher, such as H370,B350,Z370.  You will need to upgrade psu to standard 24 pin too because 9020 stock psu uses proprietary 8 pin. TPM will be addressed after you choose a newer motherboard.  But ask yourself whether you really want to keep using the 9020 case, or just get a new complete pc.
I have a Dell Optiplex 9020 Small Form Factor Desktop with an i7 3.40 GHz Processor (4th Gen). My question is, can I update my TPM from version 1.2 to version 2.0 to allow me to update to Windows 11 more easily? Also, is it possible to upgrade the CPU from a 4th Gen to a newer, more up-to-date CPU, or, would I also have to update my motherboard too?Fingers crossed someone can come up with a positive answer.Thanks in advance.
Dell Optiplex 9020 and TPM and CPU