d4r: official NVIDIA DLSS on AMD GPUs under Linux and Proton
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d4r @VERSION@: NVIDIA DLSS on AMD Radeon RDNA3 under Linux and Proton
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=====================================================================
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d4r runs NVIDIA's own DLSS Super Resolution (DLSS 4 by default) on AMD Radeon RX 7000 GPUs in
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DirectX 12 games under Proton. OptiScaler (included) catches the game's DLSS calls and hands them to
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d4r. d4r then runs NVIDIA's DLSS on the Radeon through ZLUDA, with the heaviest parts replaced by
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kernels written for RDNA3.
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This is an early release. It has been tested on one GPU (Radeon RX 7700 XT) and one game
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(SILENT HILL Townfall). Expect problems in other games.
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What you need
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-------------
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- An AMD Radeon RX 7000 series GPU (RDNA3). The fast kernels are built for gfx1101
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(RX 7700 XT, RX 7800 XT). Other RDNA3 cards run DLSS without them, which is much slower.
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- Linux with ROCm's HIP runtime, version 7 (the file libamdhip64.so.7). ROCm 7.2 was tested.
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Arch Linux: the hip-runtime-amd package. Ubuntu, Fedora and others: the ROCm HIP runtime package
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of your distribution or of AMD's ROCm repository.
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- GE-Proton 11 (tested: GE-Proton11-3), selected for the game in Steam.
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@clean - Two NVIDIA files, which this zip does not include:
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@clean - nvngx_dlss.dll, the DLSS library, version 310.7 or 310.9 (tested: 310.7.0 and 310.9.1).
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@clean Many games ship one, but often an older version. The d4r kernels check the DLSS code they
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@clean replace, so other versions still run, just slower.
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@clean - _nvngx.dll, NVIDIA's NGX runtime from an NVIDIA Windows display driver (tested: the one from
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@clean driver 596.36, file version 32.0.15.9636). Extract the driver installer, for example with
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@clean 7-Zip, and look for _nvngx.dll.
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@full - Nothing from NVIDIA: this zip already contains NVIDIA's DLSS library (nvngx_dlss.dll 310.7.0),
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@full NVIDIA's NGX runtime (_nvngx.dll 32.0.15.9636) and output kernels built from NVIDIA's DLSS code.
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Install
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-------
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1. Extract everything in this zip into the folder that holds the game's main .exe. For Unreal
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Engine games that is <game>/<Project>/Binaries/Win64/, next to <Project>-Win64-Shipping.exe.
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You get dxgi.dll, OptiScaler.ini, d3d12.dll, d3d12core.dll, this file and an d4r folder.
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If the folder already has a dxgi.dll or OptiScaler.ini (another OptiScaler install), move those
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out of the way first. Also remove PROTON_USE_OPTISCALER from the game's launch options if you
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used GE-Proton's built-in OptiScaler: d4r brings its own.
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@clean 2. Copy nvngx_dlss.dll into the d4r folder, and _nvngx.dll into d4r/ngx.
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@clean 3. In Steam, open the game's Properties:
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@full 2. In Steam, open the game's Properties:
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- Compatibility: force GE-Proton11-3.
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- Launch options:
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PROTON_FORCE_NVAPI=1 DXVK_NVAPI_GPU_ARCH=AD100 %command%
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@clean 4. Optional: check the install from a terminal in that folder:
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@full 3. Optional: check the install from a terminal in that folder:
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sh d4r/d4r-check.sh
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@clean 5. Start the game and choose DLSS in its graphics settings.
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@full 4. Start the game and choose DLSS in its graphics settings.
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The first time DLSS starts, the game can freeze for a minute or more while DLSS's GPU kernels are
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compiled. They are cached in ~/.cache/d4r, so later starts are quick.
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Settings
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--------
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- d4r/d4r.ini: d4r's settings for this game. The main one is the DLSS model:
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K (DLSS 4, default), E (DLSS 3 CNN, a little faster) or M (DLSS 4.5, slowest).
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- OptiScaler.ini: OptiScaler's settings, such as its fps overlay and the render resolution of each
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quality mode. Press Insert in game for OptiScaler's menu.
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Each game has its own copy of both files.
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Performance
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-----------
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Radeon RX 7700 XT, SILENT HILL Townfall at 2560x1440, a 62-second walk through the town, average fps:
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Mode DLSS 3 CNN (E) DLSS 4 (K) DLSS 4.5 (M) FSR 4
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Quality 72 69 51 76
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Balanced 80 76 59 84
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Performance 88 82 69 94
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Ultra Performance 89 93 90 107
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Native 2560x1440 (TSR, no upscaling): 49
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DLSS 4 in every mode, and E and M at Quality, were measured with this release. The other E and M
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figures come from the development setup, which runs the same kernels. Every DLSS frame is shown in
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the frame it belongs to, so there is no added latency.
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@clean This zip lacks the kernels built from NVIDIA's code, so its DLSS 4 is about 3 fps slower.
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Why the launch options
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----------------------
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- PROTON_FORCE_NVAPI=1 lets Proton's NVAPI run on an AMD GPU and present the GPU as NVIDIA's.
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OptiScaler only enables DLSS on NVIDIA hardware.
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- DXVK_NVAPI_GPU_ARCH=AD100 reports an RTX 40 series (Ada) GPU. DLSS then loads the network
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weights that match the kernels d4r runs.
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If something goes wrong
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-----------------------
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- d4r's log is d4r/d4r_nvngx.log. It is rewritten at every launch. Lines starting with "d4r:" and
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"nvcuda bridge:" name missing files or libraries.
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- DLSS missing in the game's menu, or no d4r_nvngx.log: check the launch options and that the
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files are next to the game's main .exe. For OptiScaler's own log, set LogToFile=true in
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OptiScaler.ini's [Log] section.
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- A wrong image: try Model = E in d4r/d4r.ini, and report the problem with both logs.
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- Do not use d4r in games with anti-cheat. OptiScaler's DLL injection can get an account banned.
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- Not supported: DLSS Frame Generation, DLSS Ray Reconstruction, DirectX 11 and Vulkan games.
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Uninstall
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---------
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Delete dxgi.dll, OptiScaler.ini, OptiScaler.log (if present), d3d12.dll, d3d12core.dll,
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D4R_README.txt and the d4r folder from the game folder, and clear the launch options. The kernel
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cache in ~/.cache/d4r can be deleted too.
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Licenses
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--------
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d4r is Apache License 2.0. The release also contains ZLUDA (Apache 2.0 or MIT), vkd3d-proton
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(LGPL 2.1, patched) and OptiScaler 0.9.4 (GPL 3.0, unmodified). d4r/source/SOURCES.txt says where
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each file comes from, and d4r/licenses has the license texts. d4r is not affiliated with NVIDIA,
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AMD or the OptiScaler project.
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@clean NVIDIA's files are yours to supply, under NVIDIA's terms.
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@full NVIDIA's files in this zip (d4r/nvngx_dlss.dll, d4r/ngx/_nvngx.dll) and the kernels built from
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@full NVIDIA's code (listed in d4r/source/SOURCES.txt) are NVIDIA's property, are not covered by
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@full d4r's license, and are included by whoever distributes this zip, not by NVIDIA.
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