Upgrade Optiplex Xe2 i5-4570S?

​frequent ask, can I upgrade i7-3770, i7-4770, i7-6700, i7-7770 etc. to i7-8700 or higher cpu in order to meet Windows 11 requirement

​unfortunately, it is impossible ​

​according to official Intel statement​

​Compatibility of Desktop 9th and 8th Generation Intel® Core™...​

​9th and 8th Generation Intel® Core™ Desktop Processors​​ use an LGA1151 socket. However, they require motherboards based on ​​Intel® 300 Series Chipset​​. Some Intel® 300 Series Chipset based motherboards may need a BIOS update to support 9th Generation Intel® Core™ Desktop Processors. Please check with your motherboard manufacturer for details.​

​These processors aren't backward compatible with motherboards based on ​​Intel® 200 Series Chipset​​ and ​​Intel® 100 Series Chipset​​.​

​Similarly, 7th Generation Intel® Core™ Processors and 6th Generation Intel® Core™ Processors aren't compatible with the ​​Intel® 300 Series Chipset​​ motherboards.​

​The Desktop Intel® Core™ processors 6th and 7th Generation support both DDR3 and DDR4 memory. The Desktop 9th and 8th Generation Intel® Core™ processors supports only DDR4 memory.​

i5-4570S is Intel 4th gen on LAG1150 socket.  It does not have the compatible socket LGA1151 for 8th gen cpu either.