FYI there's custom version of X3MSTX_1.70 available that contains the latest AMD drivers and microcode here

Unfortunately 1.70 includes AGESA 1.2.0.3a which has new security measures that renders the use of flashrom with a custom BIOS useless. More info here

So I wrote to ASRock Support to ask if "ACS Support" could be added to the 1.70 BIOS. I did not expect a response but I got one!

Zitat

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Renoir CPU natively doesn’t support “ACS” and “AER Cap” options.

For DeslMini X300 special BIOS request, we base on BIOS P1.70 to add custom BIOS settings.

Please refer to attached file to download BIOS P1.70B.

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So they did send me a modified 1.70 BIOS with "PCIe ARI Support" and "PCIe ARI Enumeration" settings included. From my previous experiments with these two options it did not expand the IOMMU groups so I'm not entirely sure the point of these two options?

Either way you can download this new BIOS from here

I'll keep a table here to keep track of ACS support that I've found inside AMD BIOS's

Hello, I have tested for 3400G sleep mode S3 is enabled all across Bios
I tried in 4650G pro and 4750G pro both is not enabled
Anyone can help how to hack the bios settings to make the S3 Mode enabled for all CPU?

that's interesting. 5700G Sleep isn't enabled either.

I wonder why - maybe 4000/5000 sleep requires more effort, and they never implemented the BIOS code for it (EDIT: or they require motherboard hardware support that they never built in). However from my recent BIOS splashscreen hacking (my instructions) I also found that there's only about 130KB of space left in the 1.72 BIOS image. Maybe they can't fit the code in? They already use a 1 pixel black splashscreen (that's why there's no logo shown when you enable it).

BTW, the splashscreen hacking also worked on my MSI Tomahawk X570 BIOS, so this seems to be pretty universal for modern BIOS'.

once more (in case you missed it): my custom BIOS splashscreen hack (works on other systems too): https://smallformfactor.net/forum/thread...106#post-256803

hi everyone, I'm new to x300 and i have one question, what does TSME option in bios 1.70 do. i guessed it is some kind of preset i can pick for the CPU (35w, 45w...)

Thank you. sorry English is not my mother language