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Ryzen 3000 series support

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linuxuser View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote linuxuser Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2021 at 9:15pm

Hello,

Recently, I've purchased a Ryzen 3700x processor, where I'm coming from an older 1700. I upgrated my Asrock Fatal1ty x370 Gaming X mobo to the latest BIOS (ver 6.00) which you can find here https://www.asrock.com/mb/AMD/Fatal1ty%20X370%20Gaming%20X/index.asp#BIOS

On Linux, everything works flawlessly. The only weird thing I could've find is that when you query cpu's capabilities:

- 'lscpu' gives: CPU max MHz 5224.2178 (which is incorrec)
- 'lshw -c cpu' gives 5.2GHz (incorrect)
- 'dmidecode -t processor' shows 4.4Ghz instead!! (which is correct)

Right now, when I watch for frequencies, they are normal (from 2.2Ghz to 4.2Ghz) when I compute via OpenMP or just on gaming.

I checked P-States via zenstates.py script and these are right, from 2.2Ghz to 3.6Ghz.

So the question is: how come it marks 5.2GHz as the maximum frequency? Is it just a minor bug?

The feeling I got tells me that I don't have to care, but I ask you cos' you maybe saw something related to this issue.

Thanks in advance. Greetings
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Coix View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Coix Quote  Post ReplyReply Direct Link To This Post Posted: 13 Aug 2021 at 11:05pm
Hi,

The CPU compatibility list of B550M-ITX/ac motherboard is a bit confusing.

In the general description of the motherboard it is noted that "*Not compatible with AMD Ryzen 5 3400G and Ryzen 3 3200G". This is quite normal, B550 chipset are usually not compatible with 3400G.

However, in the CPU support list, 3400G is listed, as supported from BIOS v1.70.

I assume that the CPU support list is more up-to-date, but can someone please confirm that this motherboard can actually work with 3400G.

Thanks in advance!
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Xaltar View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Xaltar Quote  Post ReplyReply Direct Link To This Post Posted: 13 Aug 2021 at 11:24pm
The 3400g is listed as supported with a BIOS update on all the ASRock B550 boards
listed on the website. From what I understand support was only not included for
space considerations on the ROM chip that contains the BIOS. ASRock appears to have
found a way to cut down the BIOS size and include support for a broader range of
CPUs, that or AMD's AGESA code was optimized and shrunk in size.

Regardless, if your board has the requisite BIOS version or newer it will work
with the 3400g. There would be a lot of complaints and reports of false advertizing
if it were not the case
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