When the PC industry’s two biggest graphics card manufacturers aren’t battling over benchmarks or chip-shortage woes, they’ve been fighting over a different sales pitch: boosting performance for older GPUs. And while Nvidia has nearly won that war, that success has come with an asterisk: its proprietary performance-boosting system, DLSS, requires relatively recent Nvidia hardware.

AMD’s first major retaliation was 2020’s FidelityFX Super Resolution, but this open source, hardware-agnostic option has thus far proven inadequate. And AMD finally seems ready to admit as much in its rollout of FSR 2.0, which debuted in limited fashion on Wednesday ahead of a wider Game Developers Conference reveal next week. FSR 2.0 gets a formal rollout in video games starting “Q2 2022.”

It’s time for temporal solutions

Both FSR and DLSS function in modern games as pixel upscalers. In both cases, games run at a lower base resolution of pixels, and whichever system is active processes and reconstructs the resulting imagery at higher pixel counts. This can include intelligent anti-aliasing (to reduce “stair-stepping” of diagonal lines), blurring, or even wholly redrawn pixels. Ultimately, the dream is that these systems can wisely convert games running at 1440p or even 1080p to something nearly identical to a full 4K signal.

On the most basic level, DLSS’s reconstruction system leans on a dedicated core in Nvidia’s “RTX” line of GPUs, which has been trained on a machine-learning model that has studied thousands of hours of existing video games. DLSS uses additional data to reconstruct its imagery, as well, but its dedicated upscaling core has been the difference maker for games that might otherwise be tricky to upscale. Remedy’s 2019 hit Control remains a standout example of DLSS often looking superior to native, higher-res pixel counts, especially in how it reconstructs complex textures and in-game text.

AMD can’t always compete with DLSS if it relies on a hardware-agnostic upscaler that’s at the mercy of whatever base pixels a game provides. As AMD now admits on its GPU Open news site, “with a low-resolution source, there is just not enough information with a spatial upscaler for thin detail.”

That’s where AMD FSR 2.0 comes in—or, at least, AMD wants us to think so. The update’s biggest addition is a juggle of temporal data (motion vectors, movement within a game, etc.) as a double-edged tool: to anticipate and draw pixels and to replace traditional temporal anti-aliasing (TAA). If that system upgrade sounds familiar, it should: DLSS includes its own temporal pixel interpretation system. Additionally, AMD hints that its system can treat a game’s color data as its own vector to process and upscale. Neither Nvidia nor AMD has publicly described how color-mapping upscale systems work, even though AMD hinted at it so loudly this week.

So far, the only promising example of the new system in action is a YouTube video. The post shows the FSR 2.0 system more nimbly translating temporal data as the first-person perspective shifts in the 2021 Bethesda game Deathloop. In good news, from what we can tell, FSR 2.0 appears to reduce the blur and pixel dithering that we saw in FSR 1.0’s ugliest in-motion examples from the past year.

https://arstechnica.com/?p=1841896