Demon’s Souls Remake Now Runs on PC at 40–55 FPS via PS5 Emulator

PlayStation 5 emulation keeps advancing fast: a fresh build based on KytyPS5 runs the Demon’s Souls remake at roughly 40–55 FPS on a GeForce RTX 4070 Super, and in some scenes the figure approaches 60 frames. Still, the project is far from the “install it and play through the game on PC” stage — the current demos are experimental builds with noticeable limitations.

The GameGPU test used a Core i9-14900KS, 48GB of DDR5 and an RTX 4070 Super. The game ran at 4K at 40–55 FPS, sometimes approaching 60. According to the test author’s estimate, recording via NVIDIA ShadowPlay cost another 5–10% of performance.

The developers have also managed to restore sound and significantly reduce the CPU load. But before launching, shaders have to be compiled in advance: on the specified system the process takes about 45 minutes and creates a cache larger than 2GB. Without it, severe frame drops and crashes are possible.

In a matter of weeks, the game went from 1 FPS to dozens of frames

The pace of progress is genuinely unusual. In early September, Demon’s Souls barely ran on KytyPS5 at 1–2 FPS. On September 12, results around 10–18 FPS appeared, and a day later some scenes were already hitting 30 frames.

By the end of the month, DSOGaming showed Demon’s Souls at roughly 40–50 FPS on a Core i9-14900K and an RTX 5090. But that clip lasted about three minutes and covered only a few locations, so it did not confirm that a full playthrough was possible.

The fresh build also remains unstable: there are reports of stuttering during shader processing and crashes in the early stages of the game. So the 40–55 FPS figures are better seen as a measure of how fast the emulator is currently developing rather than confirmation of full compatibility.

Demon’s Souls Remake on KyTyPS5 emu at 4k 120fps with DLSS / 4x frame gen. (local build). https://t.co/QR2mP23ctz https://t.co/Hz6VoBs1wP https://t.co/h2sXaCkhQc

— BrutalSam (@BrutalSam_) September 28, 2026

The “120 FPS” figure comes from frame generation

Demos of Demon’s Souls at 4K and 120 FPS have also surfaced online, but those numbers need an important caveat. Base performance in that test was around 30 FPS, after which NVIDIA DLSS and 4x Multi Frame Generation were used. Most of the displayed frames were generated by the algorithm and did not reflect the speed of the emulation itself.

KytyPS5 itself remains a free, open-source project in active development. Its authors explicitly warn that compatibility, stability and performance can vary significantly between builds, and crashes and graphical artifacts remain among the possible issues.

The main achievement so far is something else: in a matter of weeks, one of the most demanding PS5 exclusives went from a nearly static image to dozens of frames per second. The developers still have to reach stable 60 FPS and a playthrough without critical errors.