内容来源：https://lifehacker.com/tech/ces-2026-nvidias-updated-dlss-makes-games-run-worse-on-older-gpus?utm_medium=RSS

内容总结：

英伟达CES低调更新引争议：DLSS 4.5或致旧显卡性能下降

在今年的国际消费电子展（CES）上，英伟达并未发布新一代消费级显卡，仅对云游戏服务GeForce Now及深度学习超采样技术DLSS进行了升级。然而，其最新推出的DLSS 4.5技术却在测试中引发争议：部分旧款显卡用户在启用该功能后，游戏性能不升反降。

据悉，DLSS 4.5通过新的AI模型显著提升了光照真实感，并计划于今年春季推出动态帧生成功能。但该技术似乎主要针对新一代RTX 40/50系列显卡优化。尽管已面向全系RTX显卡开放测试，但多名RTX 3080 Ti用户反馈，在《赛博朋克2077》等游戏中帧率下降最高达24%。值得注意的是，根据Steam硬件调查数据，目前平台使用率最高的显卡为性能低于RTX 3080 Ti的RTX 3060，而DLSS 4.5同样支持更早期的RTX 2000系列，其性能影响可能更为明显。

技术分析指出，性能下降可能与DLSS 4.5基于新架构的AI模型有关。英伟达此前曾表示，该模型专为RTX 40/50系列设计。目前测试版用户可通过英伟达应用切换至旧版模型（如Model K）恢复性能，正式版将于1月13日上线。

尽管存在兼容性问题，英伟达同期宣布为GeForce Now云游戏平台推出原生Linux客户端及亚马逊Fire TV应用，为更多用户提供低成本体验高端显卡性能的途径。分析认为，此次事件反映出英伟达技术迭代正逐渐与旧硬件用户脱节，而超采样技术本应惠及硬件性能不足的用户群体，现状与之形成微妙反差。

中文翻译：

除非你运营着AI数据中心，否则英伟达在本届CES上的发布可谓波澜不惊。虽然GeForce Now云串流服务和DLSS超分辨率技术有所更新，但并未推出新款显卡。这其实无可厚非——英伟达在消费级技术领域偶尔沉寂本是常态，何况RTX 50系列显卡去年才刚面世。但令人遗憾的是，最新DLSS更新竟导致旧款显卡游戏性能不升反降。

全新DLSS 4.5技术在兼容设备上表现惊艳。即便未开启光线追踪或HDR，其渲染的光影效果已极具真实感；今年春季即将推出的动态帧生成功能，更能实时调节游戏中AI插帧数量，避免因生成超出显示器刷新率或实际需求的帧数而造成算力浪费。我在CES现场亲眼见证了这两项技术的演示效果——作为习惯优先使用原生分辨率游戏的玩家，其表现力足以让我考虑升级显卡。

但必须强调"升级显卡"这个前提。目前DLSS 4.5似乎仅在英伟达最新显卡上才能发挥最佳性能。虽然昨日已面向所有英伟达GeForce RTX显卡推出公测版，但手持旧款RTX 3000系列显卡的玩家已陆续反馈问题。据X平台用户"Mostly Positive Reviews"（通过Tom's Hardware报道）披露，使用RTX 3080 Ti显卡运行《赛博朋克2077》时性能降幅高达24%，《最后生还者2》中也出现14%的性能下滑。这仅是部分案例，社交媒体评论区与Reddit论坛中还有更多用户诉苦。

这绝非小问题。RTX 3080 Ti虽已迭代数代，但在其发布当年堪称旗舰产品。更重要的是，Steam平台数据显示当前使用率最高的显卡是性能弱于RTX 3080 Ti的RTX 3060。理论上DLSS 4.5甚至支持更早期的RTX 2000系列，这些显卡注定会遭遇更严重的性能问题。

那么性能大幅损失的根源何在？用户又该如何应对？问题很可能源于DLSS采用的全新AI转换器模型——英伟达曾明确表示该模型专为RTX 40/50系列显卡设计。虽然旧款GPU也能运行DLSS 4.5，但这显然不是技术设计的初衷。

值得庆幸的是，若在旧显卡上尝试DLSS 4.5后效果不佳，用户仍有回旋余地。当前公测版需在英伟达应用程序中通过选择"Model M"或"Model L"预设（分别位于"最新版"和"自定义"选项）来启用游戏支持，而切换至"Model K"等旧版模型即可恢复正常。待1月13日DLSS 4.5正式发布后，操作流程预计会更加简化。

尽管如此，多数英伟达玩家无法体验这项激动人心的新技术仍是憾事。虽然可逆性设置避免了系统崩溃，但这表明英伟达正逐渐将非最新代显卡用户边缘化。作为主要在Steam Deck等性能受限设备上使用超分辨率技术的玩家，我感到尤为困惑：超分辨率技术的本质本应是通过软件优化弥补硬件性能不足，理论上弱势显卡用户才是这项技术的主要服务对象。

但精打细算的玩家们也无需绝望。除DLSS 4.5外，英伟达同期宣布将为GeForce Now推出原生Linux客户端及亚马逊Fire TV专属应用，这将使云游戏平台覆盖更广泛用户群。凭借GeForce Now的免费服务层级，玩家完全可以在促销期间购置Fire TV设备（花费不足20美元），搭配免费游戏即可在大屏上畅享英伟达最新显卡算力。诚然云游戏难免存在延迟与画质压缩的权衡，但正如DLSS 4.5所示，即便使用本地硬件同样会面临各种问题。

英文来源：

Unless you run an AI data center, Nvidia's announcements this CES have been more on the quiet end. There were updates to GeForce Now cloud streaming and its DLSS upscaling tech, but no new graphic cards. That's fine—it's normal for Nvidia to have a quiet year on consumer tech every now and then, and the RTX 50-series GPUs just came out last year. Unfortunately, it turns out those DLSS updates are actually making games run worse on older GPUs.
The new version of DLSS, called DLSS 4.5, is pretty great when it works. It already makes lighting appear far more realistic even when ray tracing or HDR isn't being used, and in the spring, it will introduce dynamic frame generation, which can adjust how many AI frames are inserted into your game on the fly, so that it doesn't waste compute producing more frames than necessary, or than your monitor can produce. I saw examples of both of these use cases in person at CES, and as someone who mostly plays without upscaling when I can, I was impressed enough that I might want to get a new GPU and make the swap.
And I stress that "new GPU" part. Unfortunately, DLSS 4.5 only seems to work best on Nvidia's newest cards. It released in beta for all Nvidia GeForce RTX cards yesterday, but gamers on older RTX 3000-series cards are already reporting issues. According to a report from X user Mostly Positive Reviews (via Tom's Hardware), users on the Nvidia GeForce RTX 3080 Ti GPU could see up to a 24% dip in performance in Cyberpunk 2077, and a 14% drop in The Last of Us Part 2. Those are just a few examples, but others in the comments posted their own headaches, as did users on Reddit.
That's not a small issue. The RTX 3080 Ti might be a few generations behind, but it was near the top of the line when it was current. More importantly, according to Steam's own data, the RTX 3060 is currently the most common graphics card on Steam, and it's weaker than the RTX 3080 Ti. And technically, DLSS 4.5 is available for the even weaker RTX 2000-series, which are bound to run into even more severe problems.
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So where's this massive performance loss coming from, and what can you do about it? Likely, it has to do with the new AI transformer model powering DLSS, which Nvidia said was built with RTX 40-series and RTX 50-series cards in mind. While you can use DLSS 4.5 with an older GPU, it doesn't seem like it's intended.
Thankfully, if you decided to try out DLSS 4.5 on an older card and you don't like what you're seeing, you're not stuck with it. Currently, public DLSS 4.5 implementation is in beta, and needs to be applied to games by choosing either the "Model M" or "Model L" preset in the Nvidia app (under "Latest" and "Custom," respectively). Choosing another model, like Model K, should get you back to normal. When DLSS 4.5 gets a full release on January 13, I assume this will get even simpler.
Still, it's not a great look that most Nvidia gamers can't use its exciting new feature. Because it can be reversed, it doesn't break anything, but it also shows that Nvidia is starting to leave all but its most loyal GPU customers behind. And as someone who mostly only uses upscaling while on weaker hardware like the Steam Deck, what I find especially weird is that upscaling is already all about using software to improve performance when you're lacking raw power. That should theoretically make gamers with weaker cards the target audience.
But it's not all doom and gloom for my fellow cheap gamers. Alongside DLSS 4.5, Nvidia also announced a native Linux client for Nvidia GeForce Now, alongside a native Amazon Fire TV app. That extends the cloud gaming platform to even more users, and because GeForce Now has a free tier, it's a pretty sweet deal. Play it right, say by getting a Fire TV on sale and loading up a free game, and you could game using Nvidia's latest GPUs on the big screen while spending less than $20. Sure, you might have to deal with some latency and video compression while doing it—as is the tradeoff with cloud gaming—but as DLSS 4.5 shows, even using local hardware comes with its own problems.