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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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85
votes
4answers
201k 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
4answers
13k 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 ...
19
votes
3answers
30k 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 ...
19
votes
2answers
8k 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 ...
18
votes
5answers
5k 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 ...
15
votes
2answers
10k 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 ...
13
votes
1answer
33k 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 ...
12
votes
2answers
16k 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 ...
11
votes
8answers
36k 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 ...
11
votes
1answer
12k 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 ...
10
votes
6answers
22k 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?
10
votes
3answers
12k 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 ...
10
votes
1answer
14k 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: ...
9
votes
1answer
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 ...
8
votes
3answers
33k 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 ...
8
votes
1answer
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 ...
7
votes
5answers
3k 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? ...
7
votes
1answer
303 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 ...
7
votes
2answers
1k 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'...
7
votes
1answer
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?
7
votes
2answers
738 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 ...
7
votes
4answers
990 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 ...
6
votes
3answers
5k 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 ...
6
votes
2answers
9k 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 ...
6
votes
3answers
13k 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 ...
6
votes
1answer
2k 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 ...
6
votes
2answers
721 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 ...
5
votes
5answers
2k 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 ...
5
votes
2answers
7k 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.
5
votes
1answer
1k 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 ...
5
votes
1answer
2k 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 ...
5
votes
1answer
4k 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 ...
5
votes
2answers
4k 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 ...
5
votes
1answer
975 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 ...
5
votes
1answer
3k 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 ...
5
votes
1answer
608 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 "...
5
votes
1answer
422 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 ...
4
votes
2answers
9k 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/...
4
votes
1answer
3k 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 ...
4
votes
4answers
8k 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 ...
4
votes
1answer
3k views

What is GPU tile size contingent upon?

I've read a lot about this but most of what I've found is anecdotal or personal experience. My question is more about architecture. The optimal tile size for GPU's is universally stated to be ...
4
votes
3answers
2k views

Cycles GPU CUDA out of memory - How to identify the problem objects?

Rendering a large environment scene (also with multiple smoke and physics simulations) in Blender causes my GTX 980ti to run out of CUDA memory. (I've baked all the simulations but am unsure if this ...
4
votes
1answer
433 views

GPU render with multiple cards: Does card order matter?

I recently added a new card to my system. I am running a Titan X and 770. When testing my render speed, I found that, for the same scene and same samples, the 770 took 1:53 to render it, and the Titan ...
4
votes
4answers
3k views

Why are there scenes that will not render on GPU but will render fine on CPU?

I've already tried GPU Rendering and it seem to be twice as fast as the CPU. However I have some situation where tried to render on the GPU, but it doesn't do anything. When I switch to CPU it renders....
4
votes
5answers
1k views

Blender using wrong GPU for 3D View (This is not about Rendering)

I'm using two graphic cards in my system. I have recently replaced an old AMD gpu with a GT 710. Now blender is using the GT 710 instead of the much more powerful GTX 760. Blender now is painfullly ...
4
votes
3answers
5k views

GPU Rendering on an Intel Iris Pro (Apple Macbook Pro)

I was wondering if there now (as of Blender 2.78c) a way to use GPU rendering on an Intel Iris Pro Graphics Card. I tried to get it to work, and successfully got the GPU to show up in the System User ...
4
votes
1answer
1k views

Why can't i render smoke with my AMD graphic card

When I try to render smoke one GPU it just gives me an OpenCL error, on the CPU its just fine. I have a ATI HD 7850 2GB ddr5 OC (gtx970 just fried) and since I installed the graphic card I can't work ...
4
votes
1answer
3k views

Graphics Card Not Avalible in Blender Internal

For some reason Blender does not use my GPU when rendering, even though I have my card selected in the user preferences When I render, my CPU usage goes up to 100% and MSI Afterburner shows no ...
4
votes
1answer
2k views

Scene complexity and VRAM

I'm going to build my new workstation/rendermachine and im stuck with the question: "how much vram do i actually need?" More gpu accelerate the rendering process, but the max vram load is given by ...
4
votes
1answer
2k views

Compute device list not showing card name when using OpenCL

I have an AMD Radeon R7 M265, and when I force OPENCL with the batch file it only shows Iceland, Intel HD and the CPU. I followed this instructions: R, type CMD, ...