Clear windows branch; preserve previous contents in win-old
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d4r for Windows: NVIDIA DLSS on AMD Radeon RDNA3 and RDNA4
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===========================================================
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d4r runs NVIDIA's own DLSS (DLSS 4 by default) on a Radeon GPU in DirectX 12 games. OptiScaler
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(included) catches the game's upscaler calls and hands them to d4r.
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This is an early release. Only the Radeon RX 9070 XT has been tested on real hardware; every other
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GPU in this release is compile-tested. SUPPORTED_GAMES.md in the source repository lists the
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tested games. Expect problems.
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What you need
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-------------
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- Windows 11, a Radeon RX 7000 or RX 9000 series GPU, a current AMD Adrenalin driver.
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- A DirectX 12 game without anti-cheat (OptiScaler injects a DLL; it can get an account banned).
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- Two files from NVIDIA, which this ZIP does not include:
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nvngx_dlss.dll version 310.9.1 (tested) or 310.7.0. Many games ship one in their folder;
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right-click > Properties > Details shows the version.
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_nvngx.dll version 32.0.16.1714 (tested) or 32.0.15.9636. It is part of an NVIDIA display
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driver package: extract the installer with 7-Zip and search for _nvngx.dll.
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Install
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-------
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1. Extract this ZIP into the folder that holds the game's main .exe. For Unreal Engine games that
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is <game>\<Project>\Binaries\Win64, next to <Project>-Win64-Shipping.exe.
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If the folder already has a dxgi.dll or OptiScaler.ini (another OptiScaler install), or a
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d3d12.dll from a Linux install, move those out first.
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2. Copy nvngx_dlss.dll into the d4r folder and _nvngx.dll into d4r\ngx.
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3. Optional: check the install. In the game folder, open PowerShell and run
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powershell -ExecutionPolicy Bypass -File d4r\d4r-check.ps1
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4. Start the game from Steam, Epic or a shortcut as usual. In its graphics settings choose DLSS
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(or FSR 3.1/XeSS if DLSS is hidden; OptiScaler then feeds DLSS). Keep frame generation off.
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Press Insert in game for OptiScaler's menu.
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The first time DLSS starts, the game can freeze for several minutes while DLSS's GPU kernels are
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compiled. They are cached in %LOCALAPPDATA%\d4r\cache, so later starts are quick.
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Settings
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--------
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Edit d4r\d4r.ini (it is commented) and restart the game. Each game has its own copy.
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- Model: K (DLSS 4, default) or M (DLSS 4.5, heavier). Select the quality mode in the game.
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- AsyncInterop, ValidateOutput, Log: for testing and bug reports; the defaults are the tested setting.
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OptiScaler's own settings (overlay, render ratios) are in OptiScaler.ini.
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If something goes wrong
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-----------------------
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- Run d4r\d4r-check.ps1: it prints ok / MISSING / note lines with the fix for each problem.
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- d4r\d4r_nvngx.log is rewritten at every launch. A line "d4r: DLSS disabled: ..." says why.
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- DLSS missing in the menu and no d4r_nvngx.log: the files are not next to the game's main .exe.
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- For a bug report run d4r\d4r-check.ps1 -Report and send the ZIP it puts on your Desktop,
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with your GPU, the game, the model and what the image looked like. Logs can contain folder names.
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- Not supported: frame generation, ray reconstruction, DirectX 11, Vulkan, models E and L.
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Uninstall
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---------
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Delete dxgi.dll, OptiScaler.ini, OptiScaler.log (if present), WINDOWS_README.txt and the d4r folder
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from the game folder. The cache in %LOCALAPPDATA%\d4r can be deleted too. Nothing else was changed.
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Licenses
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--------
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d4r is GNU General Public License, version 3 only (GPL-3.0-only). This ZIP also contains ZLUDA (Apache 2.0 or MIT), OptiScaler (GPL 3.0,
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patched; the patches are in the source repository), and AMD's HIP runtime. d4r\licenses has the
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texts. d4r is not affiliated with NVIDIA, AMD or the OptiScaler project. NVIDIA's files are yours
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to supply, under NVIDIA's terms.
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