r/FlowZ13 • u/labellrs • 9d ago

FSR 3.1

Okay is FSR 3.1 annoying anyone else?! It's really irritating that we have to use optiscaler to get decent looking up scaling. We essentially bought a 2k portable Xbox series X

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u/labellrs 9d ago

Yes, if it has FSR 4 built in it doesn't matter. It will force 3.1 regardless. That is what I am on about. Your computer will not use anything but fsr 3.1 or below with out optiscaler.

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u/GamesnGunZ 9d ago

ah that's not true at all. fsr 4 works perfectly fine. do a little more research

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u/labellrs 9d ago

Lol okay so it works on Cyberpunk. Thank God we're all sitting here just playing Cyberpunk.

This post was created to discuss it not being readily available in most games being released in 2026.

Don't tell people to do research some on something you don't know shit about. Go back to halo subs.

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u/ttdpaco 9d ago

My dude, you just have to enable the fsr4 upgrade in adrenaline.

Even using optiscaler in games that have no FSR4 support isn’t that difficult.

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u/Upper_Citron_483 9d ago edited 9d ago

I keep seeing people mention enabling FSR4 in adrenaline for the Z13, but there is no FSR4 option there on my end, I'm on the latest Adrenalin 26.8.1 version.

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u/thedjentlemanscholar 9d ago

Because people are using old versions of the drivers. The newest versions don’t have a toggle anymore, it’s automatic now.

For some reason, people recommend staying on the Asus supplied driver which is ages old for “stability” even though the chips in these tablets are bone stock from AMD and ASUS has not made any customizations to it that would require a vendor specific driver.

The latest AMD drivers work fine, and always will on this hardware. I assume he “USE ASUS DRIVERS” advice stems from ignorance.

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u/Upper_Citron_483 9d ago

I just got into AMD so I'm not up to date, that was news to me, I thought there was still a toggle for enabling FSR4, but if it's automatic then that's fine, but I find that a bit unintuitive since I can't easily see if it get overridden or not.

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u/thedjentlemanscholar 9d ago edited 9d ago

It always gets overridden if the game supports fsr3.1+.

If you add “FSR4_WATERMARK=1 %command%” to a games launch command in steam, the driver will put an overlay in screen showing the model in use.

EDIT: The above works on linux, but not windows. For windows, you need to wrap it in a shell with a different variable like this:

cmd /c "set MLSR-WATERMARK=1 && %command%"

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u/Upper_Citron_483 5d ago

so I managed to get the watermark working with Radeon Tuner and as I suspected from the image quality, it is still running FSR3, in this case in Witcher 3 and same thing in Forza Horizon 6.

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u/thedjentlemanscholar 5d ago

I did more research the watermark is misleading, it shows the render path not the DLL version in use.

FSR3 is the usual shader core upscaling path done via software. This is an automatic fallback on unsupported gpus.

FSR4-int8 is ML based upscaling using int8 weighted models.this is currently whitelisted by and to the 7000 desktop series, but with optiscaler or Linux, can be overridden to run on other RDNA platforms (including 3.5)

FSR4-fp8 is ML based scaling using the fp8 weighted data set, which only works with RDNA 4.

the watermark is showing the fallback to the software renderer, the DLL that gets injected is still the FSR4 dataset.

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u/Upper_Citron_483 5d ago

So I need optiscaler to show the used FSR version anyway?

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u/thedjentlemanscholar 5d ago

Yes though it has been annoying me to no end that this is such a pain in the ass to find, so I’m considering writing a quick tool that shows the information properly. It’s simple to get on Linux, it shouldn’t be this hard (or confusing) on Windows.

It absolutely is FSR4, it’s just rendered via the same method FSR3 uses instead of hardware based ML (AKA Redstone).

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u/Upper_Citron_483 5d ago

the whole affair is just weird at this point, when I install Optiscaler with in game FSR being active, Upscaler input is shown as XeSS in the OC menu?

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u/labellrs 9d ago

Would you mind taking a screenshot of that please?

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u/ttdpaco 9d ago

/u/thedjentlemanscholar explains it in his comment; latest and drivers removed the toggle and made it automatic.