AMD is working on an answer to Nvidia‚Äôs performance and image-quality boosting super sampling tech, DLSS. But it won‚Äôt be ready for the launch of the new AMD Radeon RX 6000 series graphics cards, variously known as RDNA 2 and Big Navi, later this month. Early indications of RDNA 2‚Äôs ray tracing performance have emerged and, as expected, peg AMD‚Äôs new graphics architecture in between Nvidia‚Äôs new Ampere cards and its last-gen Turing tech.¬†
So it looks like AMD could do with some DLSS-like magic.
AMD briefly alluded to its alternative to Nvidia‚Äôs DLSS in the RX 6000 launch presentation. It labelling the potential tech as ¬†‚ÄėSuper Resolution‚Äô and placed it in the wider FidelityFX suite of technologies, which also includes the likes of variable shading, denoising and ambient occlusion. The Verge‚Äôs Tom Warren has since discussed the feature with AMD. Although AMD isn‚Äôt ready to reveal much, we do now have a few more details.
‚ÄúThe company is promising its super sampling technology will be open and cross-platform, which means it could come to next-gen consoles like the Xbox Series X and PS5. AMD is working with a number of partners on this technology, and it‚Äôs expecting strong industry support. Unfortunately, this won‚Äôt be ready for the launch of these three new Radeon RX 6000 Series cards,‚ÄĚ Warren says.
We‚Äôre confident Nvidia wouldn‚Äôt want to jump on this particular open source bandwagon, so that aspect is probably academic in terms of the battle between it and AMD. Meanwhile, major questions remain concerning AMD‚Äôs super sampling implementation.¬†
Arguably the defining feature of Nvidia‚Äôs DLSS is its use of super computers to create reference data embedded in the graphics driver, which in turn is used by Nvidia‚Äôs AI Tensor cores to upscale rendered graphics in real time and with unprecedented quality.¬†
DLSS is particularly relevant in the context of ray-tracing. The latter comes at a significant performance cost even on Nvidia‚Äôs latest Ampere GPUs. So, the ability DLSS brings to run at lower resolutions while upsampling to achieve the image quality of higher resolutions is a major benefit.¬†
Critically, it‚Äôs not known whether AMD‚Äôs Super Resolution technology will feature a comparable super computing effort to refine the upscaling process or if it‚Äôs purely an algorithm processed locally on the GPU.¬†
As for RDNA 2‚Äôs ray tracing performance, benchmarks posted by twitter user @PJ_Lab_UH suggest that even without a DLSS-like super sampling technology enabled, RDNA 2 is reasonably competitive.¬†
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The results (admittedly from a phone camera, so salt imbibing recommended) show the performance of the cut-down RX 6800 model and place it around five per cent behind the Nvidia GeForce RTX 3070 with DLSS enabled in Shadow of the Tomb Raider at 1440p.¬†
At 4K, the gap is larger, growing to around 15 to 20 per cent.
The results also put the RX 6800 ahead of the 3070 when the latter is running without DLSS enabled. Of course, according to AMD‚Äôs performance numbers from the RDNA 2 launch event, the RX 6800 carries a pure rasterisation advantage over the 3070 in Shadow of the Tomb Raider.¬†
And, when enabled, Shadow of the Tomb Raider‚Äôs ray-tracing implementation is relatively limited. So, even if these numbers are accurate, they may not be broadly indicative of how AMD‚Äôs ray-tracing performance compares with that of Nvidia.¬†
All will be revealed here later this month when the RX 6800 and RX 6800 XT are released on November 18.