It’s now possible to run Nvidia DLSS 3.7 on your Steam Deck, albeit unofficially, thanks to a new mod dubbed Helix Super Resolution (HelixSR). The mod not only opens the door to significantly better upscaled image quality on Valve’s handhelds, but also across other AMD-based handhelds, if they’re using RDNA 3 or RDNA 2 GPUs.
Sole developer lonewolf0622 describes HelixSR as an “FSR/DLSS hybrid upscaler,” as it combines Nvidia’s neural reconstruction with AMD’s interface and input handling. In a nutshell, games communicate with the mod via FSR 3.1, but the upscaling step in the rendering pipeline uses DLSS 3.7 instead.
HelixSR sidesteps the need for Tensor cores, or any form of hardware AI acceleration, which is altogether absent on the Steam Deck’s custom AMD APU. The mod does so by running the DLSS 3.7 model through standard compute shaders, additionally removing the need for Nvidia drivers, CUDA, or even AMD ROCm translation.
DLSS 3.7 is the last major revision of Nvidia’s convolutional neural network (CNN) upscaling model, with DLSS 4 and subsequent revisions adopting a higher-quality but more performance-intensive transformer-based model. While it’s not the latest and greatest in upscaler tech, this version provides significantly better image quality relative to the temporal upscaling of FSR 3.1.
YouTuber blackheart909 captured footage of the mod running on a Steam Deck OLED and ROG Ally X (above) with promising results. The video stops short of providing clear-cut comparisons between FSR 3.1 and DLSS 3.7, but if you’re at all familiar with the grainy look of the former on handhelds (as I am), you’ll immediately discern a marked image quality improvement.
For the moment, HelixSR is only compatible with games that use the DirectX12 API. That doesn’t leave too many FSR 3.1 games by the wayside, but it’s a limitation worth bearing in mind. Detailed installation instructions for both Windows and Linux are available via the mod’s GitHub repository.
Until FSR 4 support on RDNA 2 GPUs materialises in 2027, HelixSR offers a welcome boost in image quality for the Steam Deck. However, we don’t yet know how the official implementation will run on the handheld, both in terms of quality and performance. There’s a chance this mod could provide a better balance of fidelity and frame rate, but we’ll need to wait and see.
For more upscaling chatter, check out our analysis Nvidia DLSS 4.5 upscaling and ray reconstruction. I also recommend giving our FSR 4 on RDNA 3 GPUs testing summary a read.
