One of the big unknowns for the newest AMD Ryzen 5000 processors is whether or not there will be support on all 400 series chipset-based motherboards. After initially saying that these motherboards would not be supported, AMD reversed course and said it would work with motherboard vendors to enable support. At the point when the processors were launched, AMD confirmed that the schedule for the first beta BIOSes for 400-series motherboards to support Ryzen 5000 would be in the January timeframe. It would appear that ASRock has beaten that estimate by six weeks.

For 500-series motherboards, users have to look for BIOS versions with a minimum of AGESA v1081 support to enable compatibility, which should have been available since August/September on almost all models. On launch day, most 500-series motherboards had updates to AGESA v1100, which should enable full performance. The question on 400-series support would be if these motherboards would be able to support, at a minimum, AGESA v1081.

One of the main barriers to this support is both the chipset and the BIOS firmware. Supporting a new generation of processors increases the side of the firmware, and some of the 400-series motherboards were not built for large firmware packages. This means that in order to support newer processors, sometimes support for older processors is lost. There are also some complications as it relates to new power management modes on the Ryzen 5000, which require chipset support, and so building a firmware/AGESA package that can enable this (or fool the software/sensors that require it) had to be newly built for 400-series motherboards.

Today, ASRock Is claiming that it has first revision beta BIOS firmware for its B450 series ready to go. These firmware packages should enable support for Ryzen 5000 processors on the respective B450 motherboards. Users should note that upgrading most of these motherboards requires a currently supported processor, unless the motherboard supports any sort of non-powered BIOS update function. These firmware packages are also expected to keep support for Ryzen 3000 processors as well, but not Ryzen 2000 or Ryzen 1000.

ASRock B450 with Zen3 Support
AnandTech Size Beta BIOS
B450 Steel Legend ATX P3.70
B450 Pro4 ATX P4.50
B450 Pro R2.0 ATX P4.50
B450 Gaming K4 ATX P4.50
B450M Steel Legend mATX P.3.60
B450M Steel Legend (Pink) mATX P3.60P
B450M Pro 4 mATX P4.60
B450M Pro 3 R2.0 mATX P4.60
B450M Pro4-F mATX P2.40
B450M Pro4-F R2.0 mATX P2.40
B450M/ac mATX P2.30
B450M/ac R2.0 mATX P2.30
B450M-HDV mATX P4.20
B450M-HDV R4.0 mATX P4.10
B450 Gaming-ITX/ac mITX P4.20

As with all beta BIOS firmware, your mileage may vary and there may still be bugs in a variety of settings or full performance may not yet be available. Warranty is often not applicable for users running a beta BIOS.

Update: it would appear that some of these BIOSes have already been pulled from the ASRock website, for reasons unclear.

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  • Lucky Stripes 99 - Thursday, November 19, 2020 - link

    I suspect that if Ryzen 2000-series support is being dropped in these new firmware images, then so is Ryzen 3000G-series APU support as they're all Zen+ parts. That means a one-way flash for builders who want to upgrade to a 5000G-series APU when they are released in 2021.
  • artifex - Friday, November 20, 2020 - link

    The Fatal1ty B450 Gaming-ITX/ac is still up. I have no plans to upgrade from my 2600 until AM5, but it's nice to know I could. This was my first ASRock board and it's worked out well so far.
  • lmcd - Friday, November 20, 2020 - link

    350 board is doing well also, but unfortunately upgrading is constrained to Zen 2 :-/ It's tough to justify but I might.
  • daddelbud - Saturday, November 21, 2020 - link

    Great story, but Gigabyte had them available end oktober?
    Been running with 5600x and gigabyte aorus b450 itx since go live
  • jimbuscus - Tuesday, November 24, 2020 - link

    I have the Asrock B450 Pro4 and updated to 4.50 firmware, my R5-1600AF still runs as expected as my mobo had 128mb BIOS, loss of 2000 support should only be for the 16mb/32mb BIOS boards.

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