AMD Users: Guide & Testing for Enabling Nvidia Reflex Path

[netborg-afps]

Since vkd3d-low-latency features a hardware-agnostic Nvidia Reflex implementation, AMD users can theoretically benefit from the Reflex low-latency path in supported games.

However, because I only have access to Nvidia hardware, I cannot personally test or verify the quirks of bypassing vendor checks on AMD GPUs. I am opening this thread as a collaborative space to figure out the most reliable configurations.

From user feedback so far, the following methods work in a lot of games:

DXVK_CONFIG="dxgi.hideAmdGpu=True" DXVK_NVAPI_ALLOW_OTHER_DRIVERS=1 %command%

PROTON_FORCE_NVAPI=1 DXVK_NVAPI_ALLOW_OTHER_DRIVERS=1 %command% (may disable FSR4)

You may also check the log for any hints of it working or non-working, as showing the Nvidia Reflex option in game menus doesn't guarantee it is working 100%. This line should definitely appear in the log:

info:nvapi64:<-NvAPI_D3D_SetSleepMode (Enabled/0us): OK

If you are on an AMD GPU, please share your results below!

[noel-personal]

7900XTX

I noticed that the new way of overwriting FSR4 (v4.1.1) now falls back to FSR3 when using those variables:

DXVK_CONFIG="dxgi.hideAmdGpu=True" DXVK_NVAPI_ALLOW_OTHER_DRIVERS=1

Apparently that was not an issue pre v4.1.1: Korthos-Software/low_latency_layer#2 (comment)

The new DLL now comes shipped with both FSR3 and FSR4 which might explain it. Current stable releases of Proton-CachyOS, Proton-EM and Proton-GE also fall back to FSR3.

Reflex seems to work really well at first impression. 😊

Tested games: DRG: Rogue Core and MH:Wilds

proton-cachyos-11.0-20260702-base-174-g1852fa3f-x86_64 / vkd3d-proton-merge-d542ec93031f4dfa7fc4e3f2ba1a0aae85c6de34

[teodorjuravlea]

RX 9070 XT

For me, spoofing with DXVK_CONFIG="dxgi.hideAmdGpu=True" DXVK_NVAPI_ALLOW_OTHER_DRIVERS=1 was enough in all games I've tried: Overwatch, HELLDIVERS 2, THE FINALS, Borderlands 4.
DXVK_NVAPI_ALLOW_OTHER_DRIVERS=1 might not even be required, I think Overwatch was the only one which needed it.

In Overwatch and HELLDIVERS 2, spoofing was required only for one run, then Reflex stayed on and visible in the settings even if I removed the env vars.

• PROTON_FORCE_NVAPI=1 will always break FSR 4, as it also sets WINE_HIDE_AMD_GPU=1 - this shouldn't be necessary
• DXVK_CONFIG="dxgi.hideAmdGpu=True" breaks FSR 4.1.1+ due to the new mechanism they have for detecting support, like @noel-personal mentioned - check to see if your game still shows Reflex after spoofing once then removing it; if it doesn't, use FSR 4.1.0 or earlier.

THE FINALS has an exception in Proton that disables NVAPI on non-NVIDIA gpus: https://github.com/ValveSoftware/Proton/blob/25880e88befb52c5aa7ff162c5b00b6b8825e494/proton#L1347-L1367
I found the reason for it in this comment: Korthos-Software/low_latency_layer#2 (comment)
Therefore, THE FINALS shows Reflex only when setting PROTON_FORCE_NVAPI=1, breaking FSR 4.
You can, however, modify the Proton script manually, removing the entry for THE FINALS in that list - this way, only DXVK_CONFIG="dxgi.hideAmdGpu=True" is needed and FSR 4 works.
I haven't ran into any issues using this solution, even if supposedly there's a bug.

[noel-personal]

Doesn't seem to work in the games I tried I'm afraid. Reflex becomes greyed out again. In MH:Wilds it still says enabled but looking at the logs I confirmed it to be not working.

Using older FSR versions with RDNA3 is a bit annoying as the most performant versions are 4.0.0 and the leaked INT8 4.0.2. 4.1.0 runs much slower. Basically no way around optiscaler in that case.

[teodorjuravlea]

My bad, that point wasn't addressed to you specifically, it's just general advice for people to try for their games, so far it seems like it's a pretty even split between games where it works and games where it doesn't.