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Making your games look better, without having to drop a bunch of money on a new graphics

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card, is something that GPU manufacturers are keenly aware that gamers want, especially

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now that a new GeForce or Radeon card is going to cost you a spare kidney on the secondary

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market. Now, NVIDIA and AMD have both tried to use their own secret sauces to make this happen,

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both NVIDIA's DLSS and AMD's FSR have made plenty of headlines recently, but Team Green

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is adding another feature to its arsenal that it hopes will give it a leg up on AMD and

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maybe give you a leg up in your games. They call it DLDSR, or Deep Learning Dynamic Super Resolution, and if that sounds familiar,

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it's because NVIDIA's regular dynamic super resolution, you know, without the deep learning

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part, has been with us since the days of the GTX970 and 980.

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So let's talk about what exactly that is, and how deep learning improves upon it.

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DLDSR is a super sampling technique. Basically, it uses your graphics card to render your game at a higher resolution than what

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your monitor natively supports, then it scales that down to match your screen.

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This produces better looking images than just rendering at your display's native resolution.

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But why? Well, DSR more specifically works by taking samples of groups of neighboring pixels from

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the higher resolution rendered image and blending them into a single pixel that you see on your

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lower resolution display to make the resulting image more accurate.

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This is essentially the same way that Super Sample Anti-Aliasing, or SSAA, works.

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SSAA has been around for longer than DSR, but games had to implement it individually.

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DSR has the advantage of not requiring work from game developers and also puts the image

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through NVIDIA's own filter that takes into account additional surrounding pixels to further

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improve image quality. DSR has a habit of making images a little softer than traditional SSAA, meaning that

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some gamers like it and others don't. Regardless, it's a popular way to improve image quality, especially as it allows more

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granularity with exactly how hard you want your GPU to work.

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Instead of rendering the image at two times or four times your monitor's resolution,

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you could specify something like 2.25 times, depending on how powerful your GPU is.

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But both DSR and SSAA are very computationally expensive, since you're basically asking

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your GPU to do way more work and then throw away most of it.

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That is where DLDSR comes in. It leverages the tensor cores in RTX series GPUs that are designed with machine learning

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and AI in mind. The idea behind DLDSR is that the neural network and the tensor cores can figure out

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what the image should look like by sampling a smaller number of pixels than regular DSR

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or SSAA. One example NVIDIA gave was from the game Prey, which was rendered at 1620p rather than 4K,

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then downscaled to 1080p. This was accomplished with nearly no frame rate drop compared to native 1080p rendering,

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and the image actually looked a little better than the traditional DSR image that downscaled

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all the way from 4K. Similar to regular DSR, DLDSR doesn't need per game support, so it can actually make

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your older games look refreshed. But if you're using a title that supports DLSS, you can combine the two features for

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an extra quality boost without sacrificing too much performance.

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Don't expect it to work miracles, though. Early reviews have said that the quality improvement over regular DSR is pretty marginal, and of

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course, turning up the scaling factor is still going to slow your frame rate down.

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Notice that the impact won't be as huge as it would be with traditional super sampling.

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You'll need an RTX card to take advantage of DLSR, but don't feel completely left out

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if you have a card from Team Red, as AMD is set to launch its own AI-based Radeon Super

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Resolution technology in early 2022, which should work on any RDNA2 GPU.

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AMD cards, at least for now, don't have dedicated machine learning cores like NVIDIA's

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do, so it'll be interesting to see how the two super sampling methods ultimately stack

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up against each other. I just hope they'll both be super.
