What Is AMD FidelityFX Super Resolution (FSR)?

During the Computex event in 2021, AMD finally announced what numerous gamers had been anticipating: a response to NVIDIA’s DLSS (Deep Learning Super Sampling) technology.

This solution is called FidelityFX Super Resolution, or FSR for brevity.

Below, we’ll succinctly discuss DLSS to ensure that everyone properly grasps the concept and then explain FSR in detail.

Let’s dive into it!

What Is DLSS?

DLSS was in development for an extended time, and it was released paired with Nvidia’s RTX 2000 because it’s reliant on Tensor Cores which can only be found in contemporary RTX GPUs, including the 3000 series.

With the power of this hardware and deep learning, DLSS performs an upscale of lower-resolution images and outputs pictures at substantially higher resolutions.

This results in notably better performance while providing the same level of image quality (or at least minimally decreased quality).

At first, DLSS wasn’t all that impressive because the first iterations of this technology were found to lose too much quality. The extra FPS were welcomed, but users were left with fuzzy and smeared images, as seen in Control and Battlefield V.

The changes that came with the release of DLSS 2.0 were a welcome breakthrough. The performance uplift was the same, but, in some situations, games looked even better than when played at native resolution.

Today, DLSS can be found in many prominent competitive and single-player games, including Call of Duty Warzone and Black Ops Cold War, Cyberpunk 2077, Death Stranding, Watch Dogs: Legion, and several others.

Currently, the main problem with DLSS is that it requires developers to invest a significant amount of time and effort to add it to their games.

But this is where FSR comes in!

What Is FidelityFX Super Resolution?

Unlike DLSS, FSR does not rely on hardware, which provides both advantages and disadvantages against its competition.

The primary issue with FSR is its inability to maintain image quality, which was enhanced with the updated FSR 2.0 version. More on that later.

NVIDIA utilizes machine learning (powered by Tensor Cores) to fill in what the picture lacks when said image is set at a reduced resolution.

FSR uses spatial upscaling, which takes data from the current low-resolution frame and then upscales it to a higher-resolution render. However, this isn’t flawless as spatial upscaling can substantially impact image quality on lower FSR settings.

FSR 2.0

FSR 2.0, on the other hand, uses temporal upscaling. This way, FSR gets more information to process, leading to a substantially higher-quality image.

Just like NVIDIA’s 2.0 update for DLSS, FSR 2.0 delivered enhanced image quality to FSR 1 and significantly less motion blur, ghosting, jittering, etc.

Here’s Digital Foundry’s thorough test of FSR 1.0 vs FSR 2.0 vs DLSS 2.0 vs Native:

Keep in mind that both AMD and NVIDIA are constantly enhancing their upscaling technologies, so the picture quality, ghosting, jittering, and other visual artifacts have improved since this video.

FSR 3

NVIDIA DLSS 3/Frame Generation left AMD’s FSR technology in the dust even though it only works with the expensive RTX 4000 GPUs.

Fortunately, it appears that AMD might be planning a comparable solution with FSR 3.

AMD announced that FSR 3 will offer up to 2x more performance compared to FSR 2.0, which is exactly how NVIDIA promoted DLSS 3.

AMD will most probably announce their impending FSR 3 update during GDC 2023 event on March 23.

We’re delighted to see how FSR 3 will change gaming and whether it will work with most graphics cards rather than with just RX 7000.

Hardware Support

One considerable advantage FSR has over Nvidia’s upscaling solution is hardware support. While DLSS is locked to RTX hardware only, FSR can be used on various GPU series from Team Red and Team Green.

Here’s a snippet from Hardware Unboxed in which they are examining multiple older GPUs with FSR 2.0:

As we can see, GPUs from several years ago, like the RX 570 and GTX 1070 Ti, function well with FSR. The performance enhancement might not be as good as on newer GPUs, but still a welcome boost in FPS.

Other GPUs from the RTX 2000, GTX 1000, RX 5000, RX 500, and various extra can use FSR 2.0.

Game Support

Even more fascinating is that, as FSR improves over the years, the in-game implementation might become much simpler for game developers.

In fact, the implementation process is already quite straightforward. There are some reports that a developer was able to add FSR into their game in just a few hours.

Recently, AMD released the source code for their FSR technology, opening up many possibilities. Believe it or not, modders already use this source code to add FSR 2.0 to games that have DLSS, but don’t support FSR.

Currently, such mods are available for countless games including Red Dead Redemption 2, Dying Light 2 Stay Human, Guardians of the Galaxy, Cyberpunk 2077, Metro Exodus, and more.

While modded FSR may not be as stable as official FSR support, it still shows us exactly how versatile AMD’s upscaling tech is. We imagine that many moddable games in the future can and will have FSR 2.0.

Either way, multiple major studios/games already have FSR 2.0 and will continue updating it for enhanced performance and visual quality.

Compilation of several famous games that support FSR:

You can check out all supported games on AMD’s official website.

FSR Quality Levels

Like DLSS, FSR comes with a few presets in-game, which players can select from.

The four tiers of quality on FSR 1.0 are Extreme Quality, Quality, Balanced, and Efficiency.

FSR 2.0 has only three separate levels: Quality, Balanced, and Performance.

Each level of quality processes the images at a different resolution. For example, the Quality level of FSR 2.0 takes your input resolution of 1280x720p and scales it to 1920x1080p. That’s a scaling of 1.5x. Each tier of quality processes the images at a distinct resolution.

Essentially, you’re getting the FPS increase of lower resolution (720p) but get an enhanced-quality image (1080p).

Check out this scale coefficient for all FSR 2.0 configurations:

• Quality – 1.5x scale factor
• Balanced – 1.7x scale factor
• Performance -2.0x scale factor
• Ultra Performance – 3.0x scale factor

Here’s a comprehensive video comparing DLSS and FSR 2.0 in Deathloop:

Performance Gains From FSR

Deathloop

Deathloop is the initial game that supports FSR 2.0, so let’s have a look at some visual and performance comparisons.

With DLSS and FSR 2.0 set at the quality preset at 4K, the disparity in image quality is negligible even during movement.

In the image above, we can see that DLSS is superior in handling some details, like the ropes holding down the balloons. On the other hand, the FSR 2.0 image looks marginally sharper.

In other words, both of these technologies provide a high-quality image, and they have their own benefits and drawbacks.

So, if we can’t use image quality to compare FSR and DLSS, let’s have a look at the efficacy:

At 4K, Ultra settings with Ray Tracing enabled, an RTX 3060 Ti gets a performance boost of 48% over native resolution with FSR 2.0 Quality.

With those same settings, DLSS Quality delivers slightly better performance (64% increase).

In general, across all three options, DLSS does offer a slightly higher FPS compared to FSR 2.0.

Godfall

In the showcased game, Godfall, we saw a 59% increase in FPS at 4K with an RX 6800XT while using the Ultra (finest quality) setting. That is extremely remarkable. Additionally, the Quality setting offered 2x the performance while the Balanced and Performance options went well over 2x. In fact, FSR’s Performance mode delivered three times the FPS.

You’re probably expecting a but in here somewhere. Increased FPS is fantastic but not at a substantial cost to image quality. Anything below the Ultra FSR setting begins showing a loss in image quality. Balanced and Performance modes look significantly blurrier and less detailed.

This is expected as DLSS is relatively fuzzy when employing the Performance option.

While a 59% increase sounds remarkable, the question is whether or not the same results will be present in other games.

The answer is yes. FSR has now been officially released, and there are already tons of benchmarks and reviews that show the true performance advantages of this feature. Let’s have a look at another game’s visual quality and performance.