What's the issue with this new DLSS 4.5?
What's the issue with this new DLSS 4.5?
It mentions a lot of VRAM depending on the situation. How much is available in your 4070?
My prediction is that having a minimum of 16GB VRAM would be ideal for DLSS 4.5, though it's possible to function with less if you're not using high resolution. Running with 8GB might require lowering the resolution to 1080p. 1080p can still work well on smaller displays.
Be mindful that usage doesn't always match reality. I've had games work well on 3GB cards, but they're now being allocated more than before due to new capabilities.
The updated release focuses more on image clarity than speed. Evaluation results indicate a noticeable drop in frames per second when switching from 4.0 to 4.5, with even the 5090 experiencing a 2-3% reduction. Performance drops become more pronounced at lower-end cards, reaching up to 20-30% slower compared to the prior version. The reasoning behind this change is that the new version demands more processing power from the GPU, so weaker hardware suffers the most in terms of frame rate. However, personal experience with the RTX 4080 shows improved visual quality despite a slight frame rate decrease. Specific graphical issues such as jittering and ghosting in certain games have disappeared with this update. The anti-aliasing has also seen significant enhancement. If developers could achieve both higher performance and better image quality at a lower cost, it would be a strong contender for the top upscaler yet. Unfortunately, the increased frame rate requirements make it less practical for many systems, especially when native performance is available.
You can observe from my profile that I'm also on version 4080, which makes me curious about trying it out. I'm uncertain whether using third-party tools is the best approach. I also checked for a list of games compatible with DLSS 4.5, but most references only mentioned DLSS 4. It seems like most titles only support DLSS 3 or 4, making it difficult to determine the exact version they use.
You don't require a third-party tool. The process is handled via the Nvidia App. If the game allows, you can activate it (override), but if not, it will appear grayed out with an "unsupported" label. It's more effective to adjust settings for individual games rather than applying them globally, since enabling it worldwide makes you uncertain whether the games you play actually use it.