iGPU to lessen load on dGPU

[Fanjet]

I want to use my iGPU as a accelerator to dGPU, to lessen load on dGPU to get more frames

Examples for iGPU tasks with dGPU:
Post processesing
Shadows
Global illumunation
Anti aliasing

[Mike_Intel]

Hello Fanjet,

Thank you for posting in Intel community Forum.

For me to further check this, please help provide the following details:

1. What is the model of your processor?
2. What is the complete model of your GPU and dGPU?
3. Are you having issues running a game? Can you further elaborate?

If you have questions, please let us know. Thank you.

Best regards,

Michael L.

Intel Customer Support Technician

[Mike_Intel]

Hello Fanjet,

I hope this message finds you well. 

Were you able to check the previous post?

Please let us know if you still need assistance.

Best regards,

Michael L.

Intel Customer Support Technician

[Mike_Intel]

Hello Fanjet,

I hope you are having a good day.

I am sending another follow up on the information that I requested. 

Since we have not heard back from you, I need to close this inquiry. 

If you need further assistance, please post a new question as this thread will no longer be monitored. 

Thank you and have a great day. 

Best regards,

Michael L.

Intel Customer Support Technician

[the_felon]

please check this video to get the whole idea  

I’m currently facing a persistent issue with the coordination (“handshake”) between Intel iGPU and dGPU drivers after the recent separation of driver packages. I’d like to explain the situation clearly and request guidance or a fix.

System Configuration

• CPU: Intel Core i5 13th Gen (with integrated GPU)

• GPU: Intel Arc B580

• RAM: 32 GB

• OS: Windows 11

Background

Previously (e.g., driver version 6790), Intel provided a unified driver package for both iGPU and dGPU. During that time:

• Both GPUs worked seamlessly together

• Intel Graphics Software functioned correctly

• I was able to use the iGPU for encoding (OBS recording) while gaming on the dGPU without any issues

Current Issues After Driver Separation

Since Intel split iGPU and dGPU drivers into separate installations, I’ve been facing multiple problems:

1. Installation Instability

• Installing iGPU first, then dGPU → system freezes, black screens, or unresponsive behavior

• Installing dGPU first → Intel Graphics Software becomes unstable:

  • “Not Responding” errors

  • Fan control doesn’t work

  • Telemetry features fail

2. Only Temporary Workaround

The only way I can install both drivers somewhat successfully is:

1. Install iGPU driver

2. Without restarting, install dGPU driver

3. Then restart

This avoids crashes, but:

• Intel Graphics Software still doesn’t function properly

• Clean installation of dGPU driver is not possible

3. Major Functional Regression (Critical Issue)

The most important problem:

I can no longer use the iGPU for OBS encoding while gaming on the dGPU.

Before:

• iGPU handled recording/encoding

• dGPU handled gaming

• System ran smoothly with high-resolution recording

Now:

• OBS cannot properly utilize the iGPU

• There appears to be no coordination between iGPU and dGPU

• This defeats a major advantage of having an integrated GPU

Core Concern

There seems to be a lack of proper synchronization between iGPU and dGPU drivers after they were split.

This affects:

• Driver stability

• Intel Graphics Software functionality

• Multi-GPU workflows (especially encoding + gaming)

Request to Intel Team

I strongly request the Intel team to:

1. Restore proper coordination/handshake between iGPU and dGPU drivers

2. Ensure Intel Driver & Support Assistant installs both drivers seamlessly

3. Fix Intel Graphics Software so it works reliably with both GPUs active

4. Re-enable stable iGPU-based encoding alongside dGPU workloads (OBS use case)

Why This Matters

This setup is essential for:

• Content creators

• Streamers

• High-performance multitasking

Losing iGPU encoding capability is a significant regression from previous driver versions.

If there are any recommended configurations, BIOS settings, or specific driver versions that resolve this, I would really appreciate guidance.

Thank you