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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  • duploxxx - Thursday, November 19, 2020 - link

    Ian, since this is a topic related to AMD... where is the 6800-6800XT review ????
  • shabby - Thursday, November 19, 2020 - link

    Or the ampere review.
  • yeeeeman - Thursday, November 19, 2020 - link

    Ryan who does these reviews has some personal issues, check out his Instagram
  • Unashamed_unoriginal_username_x86 - Thursday, November 19, 2020 - link

    ... Instagram?????

    DYM Twitter?
  • 29a - Thursday, November 19, 2020 - link

    I don't have Instagram or Twitter. Seems like this website would be the best place to go for information pertaining to this website. Maybe they could just start linking to articles on other websites if they're not going to cover major hardware releases anymore.
  • PeachNCream - Thursday, November 19, 2020 - link

    Although I have sympathy for what Ryan is dealing with, the fact that there is a single point of failure in the publication of big ticket items like next gen GPUs and that this was a problem in prior generations (GTX 1050 review missing among others) should have resulted in planning that addressed the shortcoming when it was exposed years ago. What you see now is a consequence of that failure back when there was lots of time to build out a workable solution a long while back when it was a non-critical matter.
  • lmcd - Friday, November 20, 2020 - link

    In my opinion, the simple problem is that there is no reliable way for me to pay toward my usage of Anandtech. It's past time to offer a subscription as an option. I refuse to allow any ad network executing javascript on my devices, as do most people who have seen the breadth of attack options from that vector. I also don't upgrade hardware enough for the affiliate links to make much sense. Please let us contribute.
  • at_clucks - Friday, November 20, 2020 - link

    Soo... he's posting on Twitter and that doesn't leave time for AT reviews?
  • shabby - Friday, November 20, 2020 - link

    Lol ya strange 🤷🏼‍♂️
  • lmcd - Friday, November 20, 2020 - link

    fun fact it turns out benchmarks take substantial time and power, which constant power outages from PGE's horrific service would prevent.

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