FSR 3 Runs Faster Than DLSS 3 in Immortals of Aveum but Stutters More

wccftech.com:

AMD's FSR 3 technology is finally available today on PC with its debut in Square Enix's Forspoken and EA's Immortals of Aveum. While the former game beat the latter to the punch by releasing the update earlier this morning, Immortals of Aveum is currently the only game where users can directly compare FSR 3 with DLSS 3 - the original frame generation technology released around a year ago by NVIDIA.

FSR 3 works in a similar way to DLSS 3, as explained by AMD in a new blog post published on GPU Open. Just like with NVIDIA's technology, the regular game frame input goes through an Optical Flow workload and a Frame Generation workload, the main difference being that NVIDIA's FG is based on a trained AI network. On the other, AMD relies on a DX12-based replacement swapchain that ultimately decides which frame to present to the user:

The final decision as to when “real” or “generated” frames are seen by the user is taken by our replacement swapchain implementation – which handles both the asynchronous compute dispatch of the Optical Flow and Frame Generation workloads. It also handles the pacing of frames, and ultimately sending images into the operating system for present on the display.

This difference may be important for the end result, as we'll see in a bit. First of all, the test configuration:

The big selling point of FSR 3 is that it'll work on competing hardware, too, such as NVIDIA's and Intel's graphics cards. To my surprise, AMD's frame generation technology actually runs faster than DLSS 3 in Immortals of Aveum even on an NVIDIA GPU, at least in the captured segment. The difference in average frames per second is pretty significant, too: the RTX 4090 averages 95 FPS with DLSS, while it breaks 110 FPS with FSR - a