The B580 performs poorly in Windows 11 25H2. The frame rate in my game has been greatly reduced.

[你真的无敌了]

I'm playing Warhammer 40K: Darktide.

[DeancR_Intel]

Hi 你真的无敌了,

Thank you for providing the detailed timing information about the VRAM usage behavior. Your findings that the VRAM reaches full capacity after 3-4 hours of gameplay in Havoc40 mode, with specific increases when accessing the backpack weapon depot or weapon store, are very valuable for our analysis. I will be further checking this and get back to you once I have the information you need.

Best regards, 

Dean R. 

Intel Customer Support Technician 

[DeancR_Intel]

Hi 你真的无敌了,

Thank you for your patience and the comprehensive testing you've performed with multiple driver versions and the detailed CapFrameX data you've provided. I have an update on your Warhammer 40K: Darktide performance and VRAM accumulation issues.

I've been working with our engineering team to investigate the performance degradation and VRAM issues you're experiencing on Windows 11 25H2. After extensive testing on our end, including over 4 hours of gameplay testing with the same Intel Arc B580 configuration, we were unable to reproduce the VRAM accumulation and performance issues you're encountering.

Our testing showed consistent performance levels with no VRAM accumulation or degradation during extended gameplay sessions. Based on these findings, the issue appears to be related to a potentially corrupted Windows 11 25H2 update on your system rather than a driver or hardware problem.

I recommend performing a clean installation of Windows 11 25H2 to resolve what appears to be OS-level corruption affecting your system's memory management and graphics performance. This involves backing up your important data, creating Windows 11 25H2 installation media, performing a clean installation rather than an upgrade, then installing the latest Intel Arc B580 drivers.

You may refer to these screenshots attached.

Best regards, 

Dean R. 

Intel Customer Support Technician