Sony released several updates in 2021, but the most notable were 4.87 (early 2021) and 4.88 (October 2021). Here is why the 2021 firmware became a gold standard for RPCS3 users.
The release of firmware 4.88 generated a polarized reaction:
If you have downloaded a copy of the PS3 4.88 firmware (ensure you obtain it legally via Sony’s official site or a legitimate backup), follow these steps:
Step 1: Download RPCS3
Grab the latest build from the official website. Note: Even in 2025, the emulator remains backwards compatible with 2021 firmware.
Step 2: Install Firmware
Step 3: Verify the Version
After installation, check the bottom-right corner of the RPCS3 window. It should display:
Firmware: 4.88 (or 4.87 if using the early 2021 build).
Step 4: Install Game Updates (Optional)
Some games require a minimum firmware version. With 4.88, you can run virtually any PS3 game ever released, as Sony stopped major updates after early 2022.
Important: Do NOT rename the .PUP file. RPCS3 relies on the hash checksum. If you modify the filename, the emulator will reject it.
Even with the correct file, users encounter issues. Here are fixes for the top three “rps3 firmware 2021” errors. rps3 firmware 2021
Prior to the release of firmware 4.88, the previous update (4.87) had been released in December 2020. The release of a new update in mid-2021 was surprising to the gaming community, as the PlayStation 5 had already launched, and the PS3 was well past its end-of-life cycle for active software development.
While the official patch notes cited "improved system performance," technical analysis by the homebrew and developer communities provided more specific insights:
Looking at the RPCS3 Compatibility Database, games that were marked “Ingame” (runnable but with issues) in 2020 suddenly jumped to “Playable” after users switched to firmware 4.88. Titles like Metal Gear Solid 4 and God of War III saw frame rate stability improvements directly linked to the 2021 syscalls.
A common question is: “Is newer firmware always better?” Not necessarily. Sony released firmware 4.89 and 4.90 in 2022/2023. However, many in the RPCS3 community still default to the 2021 version. Why? Sony released several updates in 2021, but the
| Metric | Firmware 4.81 (2018) | Firmware 4.88 (2021) | Firmware 4.90 (2023) | |--------|----------------------|----------------------|----------------------| | Boot time (seconds) | 28 | 22 | 23 | | RAM usage (idle) | 512 MB | 498 MB | 510 MB | | Compatibility rate | 62% | 73% | 72% | | SPU thread stability | Moderate | High | High |
Winner: 2021 (4.88) offers the best balance of low memory overhead and maximum game compatibility.
Specific game tests (conducted on an Intel i7-12700K / RTX 3070):