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[GH-ISSUE #3002] [APP BUG]: VRAM leaks cause persistent performance loss on some systems until a reboot #952

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opened 2026-02-27 21:09:08 +03:00 by kerem · 5 comments

kerem commented

2026-02-27 21:09:08 +03:00

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Originally created by @Pr0xos on GitHub (May 28, 2025).
Original GitHub issue: https://github.com/shadps4-emu/shadPS4/issues/3002

Checklist (we expect you to perform these steps before opening the issue)

I have searched for a similar issue in this repository and did not find one.
I am using an official build obtained from releases or updated one of those builds using its in-app updater.
I have re-dumped the game and performed a clean install without mods and the issue is still present.
I have disabled all patches and cheats and the issue is still present.
I have all the required system modules installed.

Describe the Bug

CUSA03173 Bloodborne GOTY runs flawless for about 45 minutes at 30 FPS, then the game begins to stutter. That increases over the course of a few minutes till the point the game becomes practically unplayable. Symptoms only resolve after system reboot.

Reproduction Steps

rebooted the system, played for 45mins and performance degrades again.

Specify OS Version

WIN 10.0.19045

CPU

Intel i5-8600k @ 4,6GHz stable

GPU

MSI Geforce GTX 1080 8GB

Amount of RAM in GB

32 GB

Amount of VRAM in GB

8 GB

Log File

shad_log.txt

Originally created by @Pr0xos on GitHub (May 28, 2025). Original GitHub issue: https://github.com/shadps4-emu/shadPS4/issues/3002 ### Checklist (we expect you to perform these steps before opening the issue) - [x] I have searched for a similar issue in this repository and did not find one. - [x] I am using an official build obtained from [releases](https://github.com/shadps4-emu/shadPS4/releases) or updated one of those builds using its in-app updater. - [x] I have re-dumped the game and performed a clean install without mods and the issue is still present. - [x] I have disabled all patches and cheats and the issue is still present. - [x] I have all the required [system modules](https://github.com/shadps4-emu/shadps4-game-compatibility?tab=readme-ov-file#informations) installed. ### Describe the Bug CUSA03173 Bloodborne GOTY runs flawless for about 45 minutes at 30 FPS, then the game begins to stutter. That increases over the course of a few minutes till the point the game becomes practically unplayable. Symptoms only resolve after system reboot. ### Reproduction Steps rebooted the system, played for 45mins and performance degrades again. ### Specify OS Version WIN 10.0.19045 ### CPU Intel i5-8600k @ 4,6GHz stable ### GPU MSI Geforce GTX 1080 8GB ### Amount of RAM in GB 32 GB ### Amount of VRAM in GB 8 GB ### Log File [shad_log.txt](https://github.com/user-attachments/files/20478573/shad_log.txt)

kerem closed this issue

2026-02-27 21:09:08 +03:00

kerem commented

2026-02-27 21:09:09 +03:00

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@Missake212 commented on GitHub (May 28, 2025):

Might be due to VRAM overflowing overtime, next time try to monitor your VRAM usage it's most likely that.

@Missake212 commented on GitHub (May 28, 2025): Might be due to VRAM overflowing overtime, next time try to monitor your VRAM usage it's most likely that.

kerem commented

2026-02-27 21:09:09 +03:00

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@Pr0xos commented on GitHub (May 28, 2025):

It does look like that. I've been monitoring via MSI Afterburner and after about 30mins the VRAM shows a gradual increment up until max VRAM. Then random GPU, BUS and memory spikes begin to occur, sometimes making the emulator crash out, usually when using a lantern. After restarting the emulator and game VRAM usage is less than before, but the performance of the game is worse. I've attached a screenshot of the sensor values with some annotations.

I am absolutely no expert on the matter, but it looks like the VRAM keeps filling up without properly cleaning out unused entries. Is this a know issue with the emulator?

@Pr0xos commented on GitHub (May 28, 2025): It does look like that. I've been monitoring via MSI Afterburner and after about 30mins the VRAM shows a gradual increment up until max VRAM. Then random GPU, BUS and memory spikes begin to occur, sometimes making the emulator crash out, usually when using a lantern. After restarting the emulator and game VRAM usage is less than before, but the performance of the game is worse. I've attached a screenshot of the sensor values with some annotations. I am absolutely no expert on the matter, but it looks like the VRAM keeps filling up without properly cleaning out unused entries. Is this a know issue with the emulator? ![Image](https://github.com/user-attachments/assets/e1ef6a8f-bd92-4afb-9d75-e5a873fac5eb)

kerem commented

2026-02-27 21:09:09 +03:00

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@Missake212 commented on GitHub (May 28, 2025):

It is, there's no way to flush the VRAM currently, and Bloodborne being one of the few big games that's "playable" it looks like Bloodborne is the only game that has this issue but I'd say it would be the same for other big games.

@Missake212 commented on GitHub (May 28, 2025): It is, there's no way to flush the VRAM currently, and Bloodborne being one of the few big games that's "playable" it looks like Bloodborne is the only game that has this issue but I'd say it would be the same for other big games.

kerem commented

2026-02-27 21:09:09 +03:00

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@BartyMae commented on GitHub (May 28, 2025):

I was coming to report the same exact issue, even down to "persists after emulator restart, only fixed by PC restart". AMD Ryzen 5800X CPU, 64 GB of RAM, and an RX 7800 XT (16 GB of VRAM), low-ish temps system-wide. I've even tried playing only with the 484p resolution patch, but alas, the degradation still occurs, necessitating a system restart to reclaim performance.

@BartyMae commented on GitHub (May 28, 2025): I was coming to report the same exact issue, even down to "persists after emulator restart, only fixed by PC restart". AMD Ryzen 5800X CPU, 64 GB of RAM, and an RX 7800 XT (16 GB of VRAM), low-ish temps system-wide. I've even tried playing only with the 484p resolution patch, but alas, the degradation still occurs, necessitating a system restart to reclaim performance.

kerem commented

2026-02-27 21:09:09 +03:00

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@StevenMiller123 commented on GitHub (Jun 29, 2025):

For game-related bug reports, you need to test with all supported PS4 firmware libraries installed, and you need to test with no patches.
If this issue can be reproduced under those conditions, this can be reopened.

@StevenMiller123 commented on GitHub (Jun 29, 2025): For game-related bug reports, you need to test with all supported PS4 firmware libraries installed, and you need to test with no patches. If this issue can be reproduced under those conditions, this can be reopened.