Cycles barely work

This topic has 13 replies, 3 voices, and was last updated 1 year, 2 months ago by Omar Domenech.

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June 25, 2025 at 7:48 am #20353
Stas Dushko
Participant
Plane, cube, single point light and cycles – 1.5 fps.
RAM 16 GB
Intel Core I5 6600
Radeon RX 580 Series

How to fix? I just updated the drivers too. When I switch to GPU as a render device – it gets greyed out
Important note – none of the pref system settings are avalible for me
June 25, 2025 at 8:29 am #95586
Omar Domenech
Participant
Hello. Can you give much more context and explain a little more? Are you trying to render a big scene? Your computer doesn’t sound very up to date. Maybe that video card is too old and it’s not supported by Blender nowadays?
June 25, 2025 at 8:39 am #95587
Stas Dushko
Participant
That video card is fine. I am trying to render a cube and a plane. And it gives me 1.5fps when I rotate a camera. I cant pass the light course because of this
June 25, 2025 at 8:54 am #95588
Martin Bergwerf
Participant
Hi Stas @Jollium ,

Make sure that your Cycles Rendering device is set in your Preferences:
June 25, 2025 at 9:29 am #95589
Stas Dushko
Participant
Literaly nothing on the screenshot is avalible for me.
June 25, 2025 at 10:05 am #95590
Omar Domenech
Participant
Can you post your screen? Which Blender version are you using? Try downloading a different Blender version and see if it persists.
June 25, 2025 at 10:10 am #95591
Martin Bergwerf
Participant
It should not be set to None (that’s why I drew the red rectangle around it).

You probably have different Options, because you have a different GPU.
June 25, 2025 at 10:29 am #95592
Stas Dushko
Participant
Martin, nothing is avalible for me. None of the options. I deselected none, others dont work. They all say different reasons on why, but they just dont. When I press them – there is a checkbox to, well, turn them on – and it is greyed out
June 25, 2025 at 10:41 am #95593
Martin Bergwerf
Participant
Can you post a screenshot please, Stas?
June 25, 2025 at 10:48 am #95594
Martin Bergwerf
Participant
You can also have a look at the Manual: https://docs.blender.org/manual/en/4.5/editors/preferences/system.html

I never used a Radeon, things might be different.
June 25, 2025 at 10:56 am #95595
Martin Bergwerf
Participant
It could be, that your GPU is not supported, see the minimal requirements: https://www.blender.org/download/requirements/
June 26, 2025 at 10:20 pm #95596
Stas Dushko
Participant
My GPU isnt on the list. Its not supported. What do I do now? How do I even finish the course?
June 27, 2025 at 1:34 am #95597
Martin Bergwerf
Participant
You can Render on your CPU (I did that for years), upgrade your computer (best option if you want to do Computer Graphics) , or use an older Blender Version..
June 27, 2025 at 7:07 am #95598
Omar Domenech
Participant
Yeah sadly computer graphics is demanding when it comes to hardware. It’s like if you want to race cars, you’re going to need a fast car, there’s no way around that. As Martin says, rendering on the CPU is ok, that’s how we all start until we get to the point of getting a better computer.
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