Questions about AsRock B550 Extreme 4

Yes, the Ryzen 7 5800x is supported from BIOS version P1.20. The pre-installed BIOS version is indicated by a label on the mainboard. If an update would be necessary, it is explained here how to flash the BIOS via USB: https://www.asrock.com/support/BIOSIG.de.asp?cat=BIOS11

Folgendes konnte ich herausfinden: - 256Mb AMI UEFI Legal BIOS with GUI support - Supports "Plug and Play" - ACPI 5.1 compliance wake up events - Supports jumperfree - SMBIOS 2.3 support - CPU, CPU VDDCR_SOC, DRAM, VPPM, VTT_DDR Offset, CPU VDD 1.8 Voltage Multi-adjustment

Yep, 3k and 5k compatible.

I believe both intel ax201 and this mainbaord use the M Key type 2230, so this should fit