Is PS3 Emulation Possible on PS5? Tech Experts Find Fascinating Results

Digital Foundry, the prolific research arm behind many of Sony’s technical showcases, recently embarked on an ambitious trial: running PlayStation 3 games on a standard PS5 by leveraging the Linux exploit that enables the RPCS3 emulator to operate on the newer hardware.

The experiment proved that the emulation runs smoothly in cases where the PS3’s specialized synergistic processing units are not heavily engaged, underscoring both the practicality of software emulation and the likely reasons behind the absence of an official PlayStation emulator to date.

The PlayStation 5’s relatively modest central processing unit is being pressed into service as a stand-in for the Cell processor’s Synergistic Processing Units, a design decision that creates noticeable performance bottlenecks for titles that lean heavily on those specialized co-processors. In practice, this means that many games which offload a significant share of their workload to the SPUs run noticeably slower in emulation than they did on original PlayStation 3 hardware.

A prime illustration of this bottleneck is Rockstar’s Grand Theft Auto: Episodes from Liberty City. The title is particularly demanding on the PS5’s CPU during emulation, resulting in frame rates that trail behind the PS3’s native output—regardless of whether the resolution is cranked up to full 4K.

That said, the picture isn’t entirely bleak. Launch-era PlayStation 3 titles, which made far less use of the SPUs, are benefiting tremendously from the emulation layer. Ridge Racer 7 hits a buttery-smooth 60 frames per second at native 4K, while Resistance: Fall of Man holds a largely locked 30fps at 4K resolution, with only minor frame-pacing irregularities.

Even more impressively, Ninja Theory’s Heavenly Sword pushes all the way up to 2880p while maintaining a fairly steady 30fps—proof that well-optimized older titles can thrive in the PS5’s emulation environment.

The recent performance data from Digital Foundry highlights a nuanced trend in PS5 emulation, where both launch titles and later releases demonstrate varying degrees of success. While initial impressions suggest improved efficiency for newer games, the analysis reveals that certain titles from the PS3 era, such as Killzone 3 and MotorStorm Apocalypse, have achieved notable results by leveraging the SPUs to handle anti-aliasing tasks. This strategic offloading allows these games to run smoothly on the PS5 via the RPCS3 emulator, even when MLAA is disabled, showcasing the potential of hardware-software optimization in bridging generational gaps.

The technical ingenuity behind these results lies in how specific games utilize the SPUs—specialized processing units—to manage resource-intensive features like anti-aliasing. By bypassing traditional methods such as MLAA, Killzone 3 and MotorStorm Apocalypse demonstrate that emulation can be both feasible and visually acceptable on modern hardware. This not only underscores the adaptability of the RPCS3 emulator but also raises questions about the long-term viability of PS3-era titles in a rapidly evolving gaming landscape. The success of these games on the PS5 could set a precedent for how older content is preserved and accessed in the future.

Digital Foundry’s findings extend beyond individual games, suggesting that the PS6 might possess the necessary CPU capabilities to handle PS3 emulation more effectively. This conclusion is particularly significant as it implies that future consoles could overcome the limitations that have historically plagued emulation efforts. If accurate, this would mark a pivotal shift in how backward compatibility is approached, potentially enabling smoother transitions between console generations. The prospect of a PS6 capable of flawless PS3 emulation could redefine the scope of retro gaming, making it more accessible and immersive for players.

Additionally, the ongoing work by Implicit Conversions hints at a future where PS Plus Premium might integrate PS3 Classics. This speculative yet promising direction suggests that the industry is increasingly recognizing the value of preserving older titles. As emulation technology matures, the inclusion of PS3 games in subscription services could become a standard feature, offering players a seamless way to access a broader library of content without the need for physical media or specialized hardware.

While the findings showcased in this project are undeniably intriguing—hinting at significant potential—the current level of polish and reliability falls short of what would be required to bring it to market as a viable commercial offering.