NvTrueHDR - RTX HDR for games

# NvTrueHDR

(more info/discussion on guru3D, reddit & the HDR Den discord)

This page hosts several tools to help tweak some hidden NVIDIA settings for HDR & DLSS.

# NvTrueHDR

NvTrueHDR can be used to enable driver-level RTX HDR, rather than the version used by NVIDIA App which requires NVIDIA Overlay.

Driver-level RTX HDR can work with multiple monitors & can also be set to lower "quality" settings to help reduce the heavy performance hit from it (the lower quality setting can also disable the debanding filter, which had been found to remove fine detail in some cases)

So far NvTrueHDR is reported to work with most DX9/DX10/DX11/DX12 games, and may also have some support for OpenGL/Vulkan too.

For NvTrueHDR, driver 531. 18+ & WDDM 3. 1 (Win11+) are required. (TrueHDRTweaks has only been tested with 551. 23+)

# TrueHDRTweaks

TrueHDRTweaks is a plugin that can be applied onto games to customize some extra TrueHDR settings that aren't available through the NVIDIA App/profile inspector.

For example changing the "quality" level, disabling the adaptive brightness dimming, forcing the HDR brightness to specific value...

This can be used with either method of loading RTX HDR (driver-level HDR via NvTrueHDR, or NVIDIA Overlay), but must be setup per-game to work, more info can be found in the FAQ section below.

# NvTrueHDR Usage

• []First make sure HDR is enabled on all connected displays, and disable Windows AutoHDR.

• []Download the main file and run the NvTrueHDR.exe tool.

• []Enter name of the game EXE when prompted (you can drag & drop the EXE into the command window)

• []You will then be asked which action to take - either choose a quality level, choose the "HUD" option to display in-game indicator, or disable it - make your choice and then press enter.

  (VeryHigh quality has a noticeable FPS impact, measured ~10% difference between VeryHigh and Low)

• []Recommend picking the "HUD" option first to make it draw on-screen indicator squares on top-left, letting you know if it's active, once you know it works you can then re-enable it without the indicator (note that certain games may fail to draw the indicator but still have the HDR effect working - YMMV)

• []The tool should let you know whether the settings were saved successfully, now launch the game and hopefully it should then take effect.

Admin permissions shouldn't be required for this tool in most cases - some setups may prevent settings being modified for non-admins though, the tool will let you know if this is the case.

VK/OGL games may need the  "Vulkan/OpenGL present method" setting in NVCP changed to "Prefer layered on DXGI swapchain" for HDR to activate properly.

Tool also supports some command-line switches in case you want to use it in scripts or launchers, the switches can be found in the in-app usage section.

# Frequently Asked Questions

Q: My antivirus has blocked the download with a trojan warning, how do I know if it's safe?

A very small number of AVs (one or two - it seems to change often) may have false positives with this, tried a bunch of things from changing the code to adding code-signing, but still some AVs are detecting it for some reason :(

I've tried sending some emails about false positives to the AVs but no telling when they might respond.

How to know if it's safe: you can check if the EXE is signed with my signing key by following the same instructions as my DLSSTweaks info page.

Q: Will I get banned by anticheats for using this?

I can't make any guarantees, but the main NvTrueHDR tool is just changing some driver settings, no custom code or file modifications, so I'd think most anticheats would be fine with it.

It does cause some extra NVIDIA driver code to load into the game however, which some ultra-paranoid games might not be expecting.

The TrueHDRTweaks package on the other hand does