Intel Arc B580: Windows 11 Explorer Lag & Memory Leak

[ryanprime]

I have a self-built system running Windows 11 Professional:

Specs:

• Motherboard: MAG Z790 TOMAHAWK WIFI

• CPU: Intel i7-13700K (with iGPU)

• GPU: Intel Arc B580 (discrete)

• Resizable BAR: Enabled

Problem:

• Plugging displays into the dGPU causes severe Windows Explorer lag.

• Memory usage for Explorer climbs steadily (~2.5 GB) and the system becomes unresponsive.

• Displays on the iGPU work fine — no lag or memory growth.

• PoolMon shows large Nonpaged Pool allocations under @K1O (linked to igdkmdn64.sys).

Troubleshooting Tried:

• DDU driver removal and reinstall (twice)

• BIOS: PEG adapter, IGD Multi-Monitor on/off, minimal iGPU memory

• All drivers up to date. Have tried WHQL only and most recent drivers.

How can I fix this issue? I'd like to have both iGPU and dGPU active. 

[VonM_Intel]

Hi ryanprime,

Thank you for posting in our Community. To better assist, could you confirm the following:

• The exact driver version is currently installed for the Intel Arc GPU.
• Whether the issue occurs in both standard and clean installs of Windows
• If the behavior changes when only the dGPU is enabled (with iGPU fully disabled in BIOS).

I'd like to delve deeper and verify specifics like the graphics models, precise driver versions, and any system errors. Utilizing the Intel SSU tool will enable me to collect detailed information about your system setup, which could aid in identifying the underlying cause of this issue.

This will help narrow down whether the root cause is driver-related or a deeper hardware/compatibility issue

Have a nice day!

Best regards,

Von M.

Intel Customer Support Technician

[VonM_Intel]

Hi ryanprime,

Have you had a chance to review my previous response? Please let us know if you require any further assistance. I'm here to help.

Best regards,

Von M.

Intel Customer Support Technician

[ryanprime]

Hi @VonM_Intel 

I am working on gathering more information.

Thank you.

Ryan

[VonM_Intel]

Hi ryanprime,

Thank you for the update. I appreciate you taking the time to gather the additional information. Please take your time, and once you have the details, feel free to share them here so we can proceed with the next steps together.

Best regards,

Von M.

Intel Customer Support Technician

[VonM_Intel]

Hello ryanprime,

Just following up, have you had a chance to gather the additional information we discussed? Please don’t hesitate to share it whenever you’re ready, and let me know if you need any further assistance in the meantime.

Best regards,

Von M.

Intel Customer Support Technician