GPU startup error

Help and Troubleshooting
1

My gpu failed to start,keyshot2025.2

Snipaste_2025-07-13_17-14-54
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2

Hey Felix, I would just reinstall the Nvidia drivers. I mostly use the latest Studio Drivers and if you install them, don’t install the Geforce Experience/Nvidia App and select advanced > clean installation.

3

hey Oscar，I have installed the latest Nvidia drivers and cuda, but it still doesn’t work

4

That’s strange, if you look in your documents folder > keyshot studio you will see a file which says optix7cache.db that file is created if you changed drivers or run KS for the first time.

Maybe you can rename the file, than start KS again since it will generate a new file.

5

I tried the method you provided, but it doesn’t work.

6

Í don’t really have a suggestion anymore. Guess you tried to restart the PC once already else you could try. And it’s at startup so not when loading a certain scene?

7

Thank you for your help. I don’t know why I can’t use GPU. I can only use KeyShot 2025.1 version now.

8

What can I do? Who can help me?

9

I found the problem, the product selection in the lighting options, I can’t turn it on, once it’s turned on the gpu doesn’t work, I can just select another mode

1 Like
10

Nice you figured it out Felix, I can reproduce it as well. Didn’t encounter it myself yet since first thing I do is enabling the GPU mode.

@jan.simon.1 It seems Felix found a pretty severe bug. If you go to lighting product while being in CPU mode all is ok but if you have ‘product’ lighting selected and you switch to GPU mode, the GPU driver crashes immediately.

11

YES!!!This is the problem, I found the bug@jan.simon.1

12

You can create a new post to show this problem

13

I’m sure Jan will notice it. Good find! Since my CPU is so slow I don’t have scenes in CPU mode saved but this bug is easy to reproduce even with an empty scene like in my example.

14

Thanks for the report. I can reproduce this but only in an empty scene. If I fx. add a cube then I can go into Product mode and turn on GPU mode without error. Can you confirm this?

15

For me it looks that way, I saved some scene as CPU with product light enabled and switched to GPU and it functions normally. A CPU scene with basic light loaded, switching to product lighting and than turning on GPU seems to work as well.

16

I have the same problem, and it works now

17

Snipaste_2025-07-16_16-34-06

I seem to have a new problem. I just downloaded the AI model, but I can’t run the AI

18

The manual says a GPU with 16GB of VRAM is recommended. I’m not sure if that means you can run it with less (your GPU has 12GB).

19

I have 24g video memory 4090 24g

20

That should work, I’ve the same. I thought you had a 4070 by the looks of the error in the first post.