A new tool called HelixSR tricks AMD GPUs into running DLSS instead of FSR 3, no Nvidia hardware required.
HelixSR patches games to believe they're still running FSR 3.1, then swaps in Nvidia's DLSS 3.7 (Model E) behind the scenes, rendering it on regular shader cores since AMD cards have no tensor cores to lean on. Installation is a batch script: grab the 1.8.1 zip, extract it, run it, and choose which installed games to patch, with a separate script to uninstall. PCGamer tested the swap in Cyberpunk 2077 and Alan Wake 2 on an RX 9070 XT, then selected FSR or FSR 3 in each game's settings as instructed. The result: frame rates dipped slightly with DLSS in place, and image quality looked close enough to native FSR 3 that it wasn't a clear win either way.
The pitch here is really about older hardware. AMD's FSR4 already narrows the gap with DLSS, but it only runs on the newest RX 9000 and 7000 series cards, leaving RDNA1 (RX 5000 series) and RDNA2 (RX 6000 series) stuck on FSR3. Those are the cards HelixSR is aimed at, since they have no FSR4 upgrade path at all.
But the test that produced these results ran on an RX 9070 XT, a card that already supports FSR4 and wasn't even using it. Nobody has confirmed whether RDNA1 or RDNA2 owners get the same modest slowdown, the same so-so image quality, or anything at all - this is a swap of upscalers, not a verified upgrade for the cards it's supposed to help.