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Questions tagged [gpu]

A graphics processing unit (GPU) is a specialized electronic circuit designed to rapidly manipulate and alter memory to accelerate the rendering or output images.

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96 votes
3 answers
237k views

Enabling GPU rendering for Cycles?

I want to enable GPU rendering, but there is no option in User Preferences > System: Why is this? How can I get cycles to render using my GPU?
24 votes
4 answers
15k views

Cycles hybrid rendering

The Cycles render engine can render both on the CPU and the GPU. I often render over-night so I do not need my computer to be responsive. Is it possible to render with Cycles using both the CPU and ...
user avatar
22 votes
5 answers
10k views

Why/how does tile size effect performance?

The general wisdom is "for CPU use 32x32 tiles, for GPU use 128x128 or bigger, depending on your card". But why? Why should a ...
PGmath's user avatar
  • 25.2k
22 votes
2 answers
11k views

Blender sets Compute Device (CUDA) but doesn't use it for actual render (on EC2 GPU Instance)

I'm trying to set up some automated render servers on EC2 using their GPU instance type (g2.2xlarge). I'm running blender in the background with a python script that renders the image I want and saves ...
Ritwik's user avatar
  • 323
19 votes
3 answers
49k views

How will multiple GPUs improve Cycles' rendering performance?

I have an NVIDIA Titan GPU and I'm able to add another card, but I wonder whether Blender will benefit from more than one GPUs? Should I do it as SLI or should I just do it as an added card? I just ...
user1730's user avatar
  • 291
18 votes
2 answers
19k views

Cycles Render not utilizing the GPU as it should

The issue I'm having with Blender is as follows: The Cycles Rendering doesn't seem to use the GPU to its maximum power, even though I've read it should to the point where Blender UI becomes ...
Leathe's user avatar
  • 283
15 votes
4 answers
6k views

AMD GPU Material in "material preview mode" and "rendered mode", is entirely gray as background. Only outline is displayed

I don't know why but now, when i go in material preview or rendered (in solid mode it works fine), my object is entirely gray, or invisible idk, because it has the same color of the background. I've ...
Pino Vanta's user avatar
15 votes
2 answers
20k views

CUDA rendering on Linux Mint or Ubuntu variants [duplicate]

I know that nobody likes duplicate questions, but I haven't found my answer on any of the other questions with this topic. I built a computer with a GeForce GTX 750 GPU (made by Gigabyte). It ...
Anson Savage's user avatar
  • 3,412
13 votes
2 answers
42k views

GPU slower than CPU?

I've got a Macbook Pro Retina, Mid 2014, and I'm trying to get GPU rendering to work on it. I've downloaded Cuda, the GPU shows up in user preferences, and I've selected GPU Compute under the render ...
Marcus Buffett's user avatar
12 votes
6 answers
31k views

How can one do rendering with Cycles using an NVIDIA RTX GPU?

I have a NVIDIA RTX 2080. I've got an error like this: CUDA binary kernel for this graphics card compute capability (7.5) not found. Does someone know how to enable it?
jurecki0's user avatar
  • 123
12 votes
7 answers
61k views

Cycles / CUDA Error: Out of Memory

I've been struggling a little with Cycles and my GeForce GTX 750 graphic card. Most of the time it works well, but when I try to work with scenes that have custom shaders (like a skin shader with ...
Diego de Oliveira's user avatar
11 votes
3 answers
16k views

Why can't I use GPU rendering in Blender?

Why is it that Blender will only allow me to render with a CPU (GPU choice is unavailable)? Or is it until I acquire a graphics card that is specially built for such a task? The images below show a ...
uoriwoh's user avatar
  • 121
11 votes
1 answer
15k views

Is it possible to do OpenCL rendering on Intel processors?

Intel processors have supported OpenCL for a long time now; latest versions (Haswell and above) support OpenCL 2.0 or better. Why don't we have a GPU rendering option when using Blender on these ...
dotNET's user avatar
  • 949
10 votes
3 answers
14k views

Can you render using the CPU with Eevee

Is there a way to render things in eevee using the CPU or is it just a GPU render engine?
Pro Effects MAX's user avatar
10 votes
1 answer
17k views

Does Blender support dual-GPU rendering if the two GPUs aren't the same?

I have a GTX 1060 6GB in my current build, and I also have a GTX 960 2GB in storage. I was wondering if I got one of these PCI Express X1 to X16 Extension Adapter, and got both of my GPUs in one build ...
Josh Silveous's user avatar
10 votes
1 answer
17k views

How to enable GPU rendering on older Nvidia GPUs?

I have an older Nvidia graphics card that I would like to use for GPU rendering with cycles. However, I am having difficulty enabling this feature. If I open up User Preferences, I see the following: ...
Nathan Osman's user avatar
  • 1,423
9 votes
2 answers
33k views

GPU compute grayed out [duplicate]

In Blender The GPU-Compute button is greyed out. I have a fully updated system with a Nvidia GTX video card and the current version of blender. http://image.prntscr.com/image/...
BlenderNoobStudyingHard's user avatar
9 votes
3 answers
25k views

Is it possible to both GPU and CPU render in the same Blender instance?

I have a Quad core CPU, that renders 4 chunks at a time. I also have a GTX 1060, which renders one chunk at a time, but renders chunks about 4x faster than the CPU. Can I use these both in the same ...
Josh Silveous's user avatar
9 votes
3 answers
40k views

Blender Can't detect 3D hardware accelerated Driver

I have just installed blender 2.77a from blender.org om windows 8.1. When i try to open blender it gives me an error as follows Blender - Can't detect 3d hardware accelerated drivers. I have checked ...
user avatar
9 votes
1 answer
3k views

Cycles Subsurface shader: GPU compute and CPU compute give totally different results [duplicate]

Blender 2.67 Windows 7 Geforce gtx460 Head model with subsurface scattering and one texture Cpu render - fine, but slow. gpu render - face comes out black! (it was working at first it changed for ...
Triskelion's user avatar
9 votes
1 answer
3k views

turn on Cycles GPU render on non CUDA computers

Is there a way to turn on GPU rendering without an installed CUDA driver and without a CUDA enabled graphic card? I want to send the blend file on my render farm, all the slaves have NVidia CUDA ...
Neko Baka's user avatar
8 votes
5 answers
7k views

Is it possible to render a movie on a single computer in blender?

Is it possible to render a fairly graphical movie on a decent gaming-computer, with a GTX graphics-card, 4 2 GHz core CPU and 8 GB of RAM, or do you need to have a gigantic rendering-farm like Disney? ...
CutieCherry's user avatar
8 votes
3 answers
8k views

Rendering on command-line with GPU?

I am trying to submit a render job via slurm on our cluster with blender 2.8, that is, completely command-line based with no way to start the GUI on the computing nodes. I have assigned 38 CPU to the ...
mcandril's user avatar
  • 203
8 votes
4 answers
19k views

cuda error at cuctxcreate launch failed

I have been getting a launch error when i try to render a scene using my GPU. I use a GTX 1070 on blender 2.78 and the scene is very simplistic so there should be plenty of memory available. Any Idea ...
Bob Bobbinson's user avatar
7 votes
5 answers
17k views

How to make CUDA work in Ubuntu so as to enable GPU rendering in Blender?

I have installed Blender 2.78c and I would like to make Cycles and LuxRender render with GPU on my GeForce GTX 760M. In Windows it works perfectly, but in Ubuntu 16.04 and 17.04 it doesn't allow me to ...
Luiz Ventura's user avatar
7 votes
2 answers
7k views

Loading render kernels - what exactly that means?

When you render on CUDA (OptiX) for the first time, it displays the message "Loading render kernels." But what does that mean? Does it use the internet to retrieve some "kernels" ...
Crantisz's user avatar
  • 35.6k
7 votes
2 answers
5k views

View Memory Usage

Blender 2.74 - Cycles. I am working on some apparently demanding scenes - and am trying to do GPU cycles rendering. I want to be intelligent in my scene but at this moment I'm using 1.7gb ram and it'...
awptimus's user avatar
  • 179
7 votes
1 answer
378 views

Is it possible to give each render layer specific render settings?

For example, I have a RenderLayer with my scene that I can render with my GPU, but I have a scene that's point density intensive (still crashes my GPU with 2.77) and needs to be rendered with CPU. Is ...
user avatar
7 votes
2 answers
13k views

OpenCL vs CUDA Rendering

Nowdays I have the old Radeon HD 6870, and it's not compatible with OpenCL, so the rendering is made by the CPU, that is a quite slow comparing with GPU rendering. I'm thinking on a upgrade to R9 380 ...
Douglas Ferreira's user avatar
7 votes
1 answer
2k views

GPU Rendering but it appears CPU is being used

I chose my nvidia graphics card under computing device in user settings and saved the settings but when I render and check my task manager almost all my cpu is being used by blender. What is going on?
rain's user avatar
  • 519
7 votes
2 answers
7k views

AMD RX550 (4GB) GPU - OpenCL not available in Cycles Rendering Compute

I recently purchased a new GPU, and AMD RX550 (4GB), but in Blender OpenCL does not appear as a choice. Would this have to do with the fact that AMDGPU-PRO drivers include AMD's OpenCL? I don't ...
David's user avatar
  • 71
7 votes
1 answer
3k views

How to restrict to cycles use only 90% of gpu?

How to restrict to cycles use only 90% of gpu? For example redshift use always between 80-90% and because of that i can work with something else when render on video card. But when i put render on ...
bnzs's user avatar
  • 71
7 votes
4 answers
3k views

Configuring .blend file for remote machine GPU rendering

I would like to render an animation on a remote compute cluster with several GPUs. The machine I configure the .blend file on is a laptop on which I cannot enable the User Settings>System GPU compute ...
surchs's user avatar
  • 179
7 votes
2 answers
3k views

Shouldn't Blender free the GPU memory before rendering the next frame?

I'm trying to render an animation, I can provide the .blend if necessary. The problem is that if I render each frame as if it was a single render, it works fine. However, if I render it as an ...
vtr's user avatar
  • 71
6 votes
1 answer
794 views

Transparency in Blender 2.8 GPU Python Module

I've been messing around with the new GPU python module in Blender 2.8. But I cannot find a way to make my lines and triangles transparent. The alpha channel is completely ignored. I even tried it ...
WalterTheModeler's user avatar
6 votes
1 answer
9k views

Render on GPU from command line on Ubuntu server

For best render performance and more free VRAM I installed Blender on an Ubuntu server without GUI. I launched Blender from the command line using argument and all was OK, but after installing it ...
igor's user avatar
  • 61
6 votes
2 answers
6k views

Why does baking a fluid sim use so little CPU?

The CPU graph on my Windows machine barely moves up when I start a fluid sim bake, and the bake takes at least 10 minutes. It's very different from rendering where I can see it max out all of the ...
lumpynose's user avatar
  • 656
6 votes
2 answers
2k views

Cannot enable GPU

Before anything, I must mention that I've already read all similar questions and answers from this community before posting this one, so no need to close as duplicate, its not duplicate. My render ...
Trance - Doar Cu Tine's user avatar
6 votes
0 answers
21k views

cycles stuck at loading render kernels

ever sense I have been using the new LTS version or a newer version of blender its not loading the render kernels or sometimes it will but its just painfully slow even with the default cube scene has ...
hunter's user avatar
  • 61
5 votes
5 answers
4k views

Mac Pro Tower - Sapphire Radeon Rx580 is really, really slow

I recently installed a Sapphire Pulse Radeon Rx580 8gb on my 2010 era (with upgraded CPU) Mac Pro tower. I did this because my former GPU, a NVIDIA GTX 970 is not "Metal Compatible" and would not ...
Brad Hoehne's user avatar
5 votes
1 answer
6k views

Use Blender Cuda Build to use GPU in Simulations:

Ok, my current situation is this: I have a very slow CPU (AMD Athlon 750X (2 Cores 4 Threads)) But I have a pretty fast GPU (NVIDIA GeForce 1080) The GPU actually supports CUDA 6.1 I need to bake ...
Fabrizio's user avatar
  • 728
5 votes
2 answers
20k views

Use secondary computer for rendering

I've got two machines: my developer-notebook for active working, and my standalone tower with a much better GPU. I'm simply using the tower for standalone tasks so I'm just working on it via RDP or ...
EchtFettigerKeks's user avatar
5 votes
1 answer
2k views

Is it possible to use two GPUs in viewport rendered preview, and not only for final render?

I have two Nvidia GPUs and they work fine in normal rendering (when I press F12, both are working). However, in viewport, when I select "Rendered" as a viewport shading mode, only one is used. Is it ...
jubi's user avatar
  • 2,826
5 votes
2 answers
13k views

How important is a GPU for modeling?

I don't plan to be doing much cycles rendering, but I wanted to know if a GPU is still important if I'm doing high-poly modeling.
user383's user avatar
  • 201
5 votes
1 answer
3k views

Screen lag during GPU rendering

GPU rendering causes some screen lag while rendering, with the amount depending on how heavy the render is. I understand this is due to the display driver being busy. What I don't get is why it ...
Ascalon's user avatar
  • 6,629
5 votes
1 answer
1k views

How to bypass OpenGL 1.2 requirement for remote GPU rendering?

Disclaimer: I am aware that this question is very similar to these two and that the answer to my question would probably be applicable to them, too: How to run blender 2.77 on a virtual network ...
Oliver Giesen's user avatar
5 votes
1 answer
1k views

Cycles render is different when rendering with GPU

I came across a problem which I couldn't find any solution through google. When I render with my GPU, I have a different render than with the CPU. My CPU is an amd phenom 2 x4 965, the GPU is a R9 ...
Vladimirovich 's user avatar
5 votes
1 answer
384 views

Using Blender for Radio Frequencies

I'm a researcher interested into radio channel modeling and I'm currently working with a custom-built ray-tracer for such purpose. I would like, though, to have better performance, e.g., using GPU ...
Mattia's user avatar
  • 51
5 votes
1 answer
691 views

Why is my Blender UI glitchy when using rendered preview?

When I enter rendered preview with cycles, the UI keeps turning black. GIF showing the problem. I noticed that the problem isn't occurring when I change the "Window Draw Method" from "Automatic" to "...
J. Larsen's user avatar
5 votes
1 answer
505 views

Force Cycles GPU rendering for a Render Farm

So basically I'm on vacation for 2 weeks with a laptop without a CUDA device. I do have access to a render farm with GPU rendering support. Now the problem is that I can't setup blender to render in ...
X_Joshi_X's user avatar
  • 113

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