Area-51 R2, Windows 11, CPU upgrade?

Apologies if this is not the correct area to post this question, but I'm looking to upgrade the CPU on my system for Windows 11. Any assistance is appreciated.

System Model Alienware Area-51 R2
System SKU 064C
Processor Intel(R) Core(TM) i7-5820K CPU @ 3.30GHz, 3301 MHz, 6 Core(s), 12 Logical Processor(s)
BIOS Version/Date Alienware A14, 02/07/2018
SMBIOS Version 3.0
Embedded Controller Version 14.07
BaseBoard Manufacturer Alienware
BaseBoard Product 0XJKKD
BaseBoard Version A01
Installed Physical Memory (RAM) 16.0 GB