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Hi John R DiCello,
Yes, it is supported to run Windows Server 2022 Essentials on an AMD Ryzen 7900x processor.
You can find the hardware requirements for Windows Server 2022 and the limits for Windows Server Essentials in the links below.
https://learn.microsoft.com/en-us/windows-server-essentials/get-started/hardware-limits
Best Regards,
Ian Xue
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