HelixSR Brings DLSS 3.7 to Steam Deck and AMD Handhelds, Beating FSR 4 in Early Tests

A new community mod called HelixSR is bringing NVIDIA's DLSS 3.7 image reconstruction technology to Steam Deck and other AMD powered handhelds, despite the hardware lacking NVIDIA GPUs.

Released by developer lonewolf0622, HelixSR works as a replacement for AMD's FSR 3.1 upscaler in Direct3D 12 games. Instead of using AMD's reconstruction method, the mod runs the neural network from DLSS 3.7 Preset E through ordinary DirectX 12 compute shaders.

This approach means the technology does not require NVIDIA drivers, CUDA or ROCm. It can also operate on Linux through Proton and vkd3d proton, making Steam Deck one of the main devices that could benefit.

Early community testing suggests HelixSR can run significantly faster than unofficial FSR 4 implementations on older AMD hardware.

DLSS 3.7 Runs Without an NVIDIA GPU

HelixSR uses the final CNN based reconstruction model introduced with DLSS 3.7 before NVIDIA moved to Transformer based models with DLSS 4.

The older CNN model requires less computing power, making it potentially better suited to devices such as Steam Deck and ROG Ally.

Games continue to behave as though they are communicating with FSR 3.1. HelixSR intercepts that process and replaces the image reconstruction stage with the DLSS model.

HelixSR feature	Details
Reconstruction model	DLSS 3.7 Preset E
Supported graphics hardware	AMD GPUs
Primary target	Steam Deck and AMD handheld PCs
Graphics API	Direct3D 12
Linux support	Yes, through Proton and vkd3d proton
NVIDIA driver required	No
CUDA required	No
Vulkan support	No
Games without FSR 3.1	Require OptiScaler

This makes HelixSR fundamentally different from running NVIDIA's official DLSS implementation, which normally depends on supported GeForce hardware and NVIDIA's software stack.

Early Tests Show Lower Processing Cost Than FSR 4

Community benchmarks indicate that HelixSR may have an important performance advantage over unofficial FSR 4 implementations on older AMD hardware.

One Steam Deck test measured HelixSR at roughly 3.5 milliseconds per frame at 800p, compared with about 4.5 milliseconds for FSR 4.

At 1080p, HelixSR required around 7 milliseconds, while FSR 4 took approximately 11 milliseconds with the Steam Deck GPU operating at 1400 MHz.

Another test using a BC 250 system produced an even larger difference in Hitman: World of Assassination at 4K.

Using the DLSS Quality setting, HelixSR reached 35 FPS, compared with 17 FPS using FSR 4.

These figures come from early community testing rather than standardized independent benchmarking, so performance can vary depending on the game, hardware and settings.

Image Quality Falls Somewhere Between FSR 3 and FSR 4

Initial impressions of visual quality are mixed.

Some testers consider HelixSR slightly behind FSR 4 but clearly better than FSR 3. Others believe the DLSS 3.7 model can look better than FSR 4 in certain situations.

Testing on Steam Deck reportedly produced between 34 and 40 FPS in Pragmata using Performance mode.

On the ROG Ally X, CONTROL Resonant reached around 35 to 40 FPS at 1080p. Lowering the output resolution to 720p reportedly allowed the handheld to maintain 60 FPS.

The latter result is particularly notable because the game had previously shown significant ghosting problems on the device.

Five Updates Have Already Expanded the Mod

HelixSR has developed quickly since its initial release.

Within only a few days, the developer released five updates.

These added a single file installer and a new Quality Super Sampled Mode, or QSSM, which renders above the display's native resolution to improve edge quality.

Another update addressed blurry output reported on RDNA 3 GPUs running Windows.

The project still has important limitations. Direct3D 12 is currently required, and Vulkan games are not supported.

Games that do not already include FSR 3.1 support require OptiScaler to integrate HelixSR.

Steam Deck Could Benefit Most From the Mod

The Steam Deck remains based on RDNA 2 graphics hardware, while many newer handhelds use RDNA 3 or more recent architectures.

Official FSR 4 support has largely focused on newer AMD GPUs, leaving older devices dependent on previous upscaling technologies or unofficial workarounds.

HelixSR provides another option that appears to require less processing time than FSR 4 while producing better image reconstruction than FSR 3 in early testing.

That combination could become especially useful as newer PC games place more pressure on Steam Deck's limited GPU performance.

The project is still young, and broader testing will be needed to establish compatibility and image quality across more games. Even so, its early performance suggests that running a DLSS 3.7 based reconstruction model on AMD handheld hardware is not only possible, but potentially practical.