until we see Zen 3, so they do have a lot of time to try things and to test things.There might be a situation where moving up to the beta BIOS fork will make the system unable to downgrade. The AMD B550 chipset is an upgrade of the B450 chipset from 18 months ago, introducing three key features : PCI Express 4.0 support for both graphics cards and NVMe storage; Dual GPU support ; PCI Express 3.0 general purpose lanes; This AMD table gives you a good idea of what the B550 chipset offers over the B450, and how it differs from the X570. To cut a long story short, the TL;DR mantra from AMD is:They are acknowledging that they perhaps misread the situation from its user base. Part of this issue stems from an old CPU line not having the growth room, and the believed that pushing support for Zen 3 to the 500-series wouldn’t be that big of an issue. All of this takes up space, and some vendors ditched the fancy graphics in order to support more processors.AMD's full press release is given below.AMD today is reversing its decision to limit the BIOSes on the 400-series chipsets. AMD will supply board partners with a beta BIOS for B450 and X470 motherboards that will enable Zen 3 support. The fact that there was a discrepancy between what the users expected and what AMD had been saying essentially became a miscommunication or a misunderstanding, but one that had a negative effect on a number of users who were expecting to upgrade the system.As a result AMD initially made the decision that the B450/X470 motherboards would support the Ryzen 1000, Ryzen 2000, and Ryzen 3000 processors, but would not be able to support any more due to this limit. This is going to be a ‘promise now, figure out the details later’ arrangement, but this should enable most (if not all) users running 400 series AMD motherboards to upgrade to the Zen 3 processors set to be unveiled later this year.On that chart, it was noted almost immediately that there was a glaring omission. As a result AMD initially made the decision that the B450/X470 motherboards would support the Ryzen 1000, Ryzen 2000, and Ryzen 3000 processors, but would not be able to support … Support; FAQ; CPU Support List ; Model Name Finding; SN Finding; BIOS Version Finding; Repair / RMA; Networking Support; Contact Technical Support (MB / Mini PC / IPC) Contact Technical Support (Networking) Webmaster Mailbox; Family Model Core Frequency Cache CPU Rev.

It might end up being a one-way solution. Also, since all the Ryzen processors are unlocked out-of-the-box, the B450 will also … Now that they see it is, they will try to make it work. AMD stated that this might be a possibility, but they haven’t worked on those details at this time.AMD also re-confirmed that we are set to see Zen 3 processors in 2020.AMD came under a lot of fire.

It might even be a hard changeover – with the mainline supporting 3000 and below, and the fork 4000 and up. It is believed however that if most of the vendors are onboard straightaway, then the rest will follow. Support Models. CPU Support List . This is what makes it such a tight squeeze.As most motherboards have 16 MB, and the CPUs can only address the first 16 MB of a BIOS chip, then we might see an issue where 400-series motherboards may end up having two ‘forked’ BIOSes – one for ‘up to Ryzen 3000 inclusive’ and one for ‘Ryzen 3000 and beyond’. In order to get the best experience, AMD still recommends that customers opt for a 500-series board.AMD will supply board partners with a beta BIOS for B450 and X470 motherboards that will enable Zen 3 support. If they’re not willing to complicate matters with this BIOS fork, then unfortunately you are out of luck. In order to make room for the code to support the new processors… In this event, I asked AMD if they would be expanding the Boot Kit program as they did with Ryzen 2000, and lending CPUs to users that needed them to update. CPUs released after Zen 3 will require a new motherboard, we’re told. So even if a motherboard vendor had a larger BIOS chip, say MSI had a 32 megabyte chip, then it would actually operate like two partitioned BIOSes and it would get very complicated. See Comparison of ATI Chipsets for the comparison of chipsets sold under the ATI brand for AMD processors, before AMD's acquisition of ATI.

A lot of users had assumed that this meant any AM4 platform based motherboard would be able to accept any processor made from 2016 to 2020, including the new Zen 3 processors set to be unveiled later this year.

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