英伟达 DLSS 5 十月更新：性能翻倍，显存占用降 20%
英伟达公布 DLSS 5 神经渲染模型的十月更新：新模型速度为此前版本的两倍，自今年 3 月首次展示以来累计提升约 10 倍；模型规模缩小 24% 至约 1.18 亿参数，4K 分辨率下显存占用减少 20%，在画质相近的情况下 GPU 负担约为九月版本的一半。英伟达称部分游戏帧率最高可提升 1.4 倍，TechRadar 则援引其在《NBA 2K27》中的测试称提升幅度为 30% 至 40%。新模型将于 10 月 16 日率先随《NBA 2K27》上线，支持 RTX 50 系列显卡、RTX Spark 笔记本与 GeForce NOW；《霍格沃茨之遗》定于 11 月 5 日获得支持，《燕云十六声》则被描述为“近期”推出。此外，英伟达推出用于帧生成的更快性能模式“Preset C”，以更轻量的算法取代原先用于光流计算的 AI 模型，官方称在 RTX 5060 上可提升约 35% 速度，但承认存在轻微的画质取舍，并有媒体提到该模式可能带来更多画面瑕疵。The Verge 指出，与三月预览相比，《霍格沃茨之遗》中 DLSS 5 对人脸的处理已明显收敛。
按照英伟达的说法，本次更新在画质相近的前提下把 GPU 负担相比九月版本减半，直接回应了外界对 DLSS 5 性能开销过高的批评。
Nvidia has today announced that its somewhat controversial DLSS 5 technology — AI-powered neural rendering for gaming — is now two times faster than the current model, marking a 10x performance leap since March. The model is also now smaller and uses up to 20% less VRAM.
Nvidia says it has achieved this through a combination of "systematic pipeline optimizations and neural model refinements." As mentioned, the latest performance jump over the current model is a 2x leap, which means that the transformation DLSS applies to games through lighting and beyond will now run at higher frame rates or more intense settings.
Nvidia says the DLSS 5 October update shrinks the overall DLSS 5 model's footprint by nearly a quarter to 118 million parameters, and reduces VRAM usage at 4K by 20%. As such, the company claims that at similar visual fidelity, the GPU overhead versus the September model has been halved. Elsewhere, Nvidia says the change can boost frame rates by up to 1.4x.
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