Suddenly Iray doesnt work anymore

James

Even with no scene and only G9 on the viewport, iray doesn't work nomore.
Can't render either.

My GPU is 4070ti.

2023-09-05 15:42:29.731 [WARNING] :: ..\..\..\..\..\src\pluginsource\DzIrayRender\dzneuraymgr.cpp(369): Iray [ERROR] - IRAY:RENDER ::   1.0   IRAY   rend error: Cannot render: found no usable devices. Please update your NVIDIA driver (www.nvidia.com) to at least 471.41, or enable CPU-only rendering.
2023-09-05 15:42:29.731 [ERROR] Iray :: Invalid parameters (NULL pointer).
2023-09-05 15:42:29.789 [INFO] :: Saved image: C:\Users\USER\AppData\Roaming\DAZ 3D\Studio4\temp\render\r.png
2023-09-05 15:42:29.793 [INFO] :: Finished Rendering
2023-09-05 15:42:29.818 [INFO] :: Total Rendering Time: 2.46 seconds

The log says can't find usable device??

What to do?

 

Leana

As the log says, update your GPU drivers.

PerttiA

If it has been working before, are you allowing Windows to update your GPU drivers? The ones Windows is 'updating' to are not compatible.

This is the one and only place one should use for Nvidia drivers; https://www.nvidia.com/Download/index.aspx
 

James

I've updated the driver to the latest through Geforce Experience.
But no luck

-------

Currently I switch to the DAZ3d public build version, it can do the iray.
 

James

My iray dead again.

I think it happened when I put my computer on sleep mode, when awaked, it didn't awake instead restarting, after that I can't do iray on public build version too.

James

Never mind,
It's alive again for both version.
I don't know what's going on

James

It stops again.
Does anyone has any idea, what could be wrong?

I have reisntalled the VGA driver. 536.99

James

Okay, hopefully I've fixed the problem.
It seems, the newest NVIDIA driver doesn't work well with DAZ3d.
So I installed an older driver 531.61 studio driver.
and  the iray preview and render works again.