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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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Cycles GPU rendering turns to really slow with big image sizes

The question seems noob, but give me a moment, because I should know something about these things. I am rendering a semi large architecture outdoor scene with buildings and nature surrounding it. The ...
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2answers
102 views

How do I get Blender working with AMD OpenCL on Linux?

I am using Arch Linux and am trying to use GPU Rendering in Blender. In the Arch Linux Wiki from Blender I read that I need either the AMDGPU-PRO or the opencl-amd package. So I installed the opencl-...
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2answers
44 views

GPU Rendering Only in Viewport (Cycles)

I've enabled GPU rendering (CUDA) for my GTX 1060 and it's awesome. 3D viewport views render much faster than before. Monitoring my GPU shows it at 60-100% usage while Cycles samples. However, when ...
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2answers
37 views

What is a 8, 4, 2 and 1k texture?

I read about this for GPU computation and limitation. I don't know what it is...
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0answers
38 views

How to ensure Blender uses the GPU when running from the command line on a headless Linux computer?

I have Blender installed on a Linux machine with 6 Nvidia GPUs (GTX 1060) I have an ssh connection into it but it doesn’t look like Blender is using the GPUs. The ...
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1answer
50 views

Why render time in blender is increasing 10 times after rotating 3d model?

I'm rendering this scene in cycles (blender) on GPU with GTX 780 3GB In preview mode it takes about 2mins to render 2000 samples. In final render mode it takes about 40 seconds But i need to rotate ...
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1answer
16 views

Why render time in blender is increasing 10 times after rotating 3d model?

I'm rendering this scene in cycles (blender) on GPU with GTX 780 3GB In preview mode it takes about 2mins to render 2000 samples. In final render mode it takes about 40 seconds But i need to rotate ...
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1answer
48 views

I'm new to blender, Help me! [closed]

I want to learn Blender, Unity and Unreal, and I’m about to purchase new laptop. The question is do I need touch screen or touch tablet for blender? Do I need to be artist to use Blender? Also, did I ...
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0answers
23 views

Which command is the right one for rendering with GPU?

I have a script that loads a scene with objects, cameras etc. and also sets the gpu rendering settings. When I use the script up until the rendering command and then click on the render button, the ...
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1answer
83 views

Unable to render with cycles using GPU: failure to compile CUDA kernel

I am failing to render with Cycles. When I hit F12 in a default scene (just a cube) it says "CUDA kernel compilation failed, see console for details." I read that you can pull down from the top of the ...
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0answers
15 views

Cuda error in the middle of render

I just rendered animation of the same scene i am trying to render now just with higher samples. It rendered fine when i rendered the animation which was at lower frames, but now i am trying to render ...
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0answers
14 views

Blender crashes with GPU installed

On a recently assembled computer, attempting to run the BMW Benchmark using CPU render causes the screen to flickers after a few minutes and blender crashes, while using GPU render works fine. After ...
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1answer
76 views

Blender scripting GPU acceleration

Is there any possible way to accelerate the python's script execution inside of blender using GPU ?
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1answer
36 views

multi gpu also for viewport?

does having more than one gpu also have an impact on speed of the rendered viewport in cycles ? (renderd viewport i mean the traditional shift z render ) or multi gpu rendering is only okay for the ...
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1answer
29 views

Blender not using selected compute device

I have 2 GeForce GTX 750 Ti GPUs in my system (no SLI), the first has 3 monitors on it and the second has nothing connected. Under the system tab in user preferences I selected the second GPU to be ...
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0answers
46 views

Problem with GPU rendering : Radeon RX 470

I need help about rendering in Blender, when I try to render using GPU it freezes and quits the program without any changes. CPU render works well. I'm using Radeon (TM) RX 470 Graphics.
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0answers
124 views

How to fix CUDA error: illegal address in cuCtxSynchronize(),line 1372

I am having trouble to render anything on cycle render mode with my GPU. I can render anything with my cpu but why my gpu is not working.I will be very helpful if I get some answers. My pc spec GTX ...
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0answers
23 views

GPU doesnt show up in Zip Versions of Blender releases

I thought that my GPU didn't support CUDA until i checked the installed version of Blender. Because i never really used the installed one from the start, it didn't come across. The new releases i've ...
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0answers
114 views

Blender 2.79 does not detect GPU AMD RX580

I've bought AMD RX580 recently and it seems Blender can't detect it, it has "none" in cycles compute device in system settings. I have ubuntu 18.04 installed, and already installed latest AMD linux ...
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0answers
55 views

How do I enable GPU rendering for Radeon 5870 in Linux?

I am running Ubuntu 18.04, I use blender 2.79, and my GPU is an ATI Radeon HD 5870. I am really hoping someone here can help me with setting up GPU rendering. I have installed many different ...
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1answer
65 views

2 GPUs but only one render tile [duplicate]

I have two GTX 1080 and for a while when i press F12 blender rendered everything with 2 tiles. Right now no matter what i do there is only one render tile. In system tab in user preferences i can ...
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0answers
43 views

Why are there holes in a mesh when I am rendering with my GPU in Cycles?

I have a big peoblem. It started to happen few weeks ago, which makes me think that it is because of the update to Windows 10. (Also I had trouble with Photoshop.) The problem is, I can render all ...
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0answers
88 views

CPU render result differs from CUDA's one on smoke [closed]

The final result of a smoke render differs if using GPU (NVIDIA 1050 Ti) or using CPU (AMD 1300X). Any idea why? CPU render - Volume sampling 0.1 - Volume bounces: 0 CUDA render - Volume sampling 0....
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0answers
23 views

Rendering with GPU [duplicate]

I've enabled CUDA in User Preferences and Selected GPU Compute in the render menu. When I render a model it takes the same time for Rendering with the CPU only and GPU Compute mode, sometimes it ...
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1answer
174 views

GPU Rendering Slower?

After looking around the web for a while, I've gathered that GPU rendering in Blender is supposed to be much faster than CPU rendering, but on my machine, the CPU is actually slightly faster? My GPU ...
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1answer
41 views

Cycles GPU Render button is looking passive [duplicate]

I am adding a image. Why i can't use this render?. I am using Windows 10 and AMD Radeon Software. My Blender versiyon is 2.79. I did install yesterday (27.06.18) I can't find a solution for AMD Radeon ...
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0answers
44 views

Same scene 1 GPU = OK, 2 GPUs = Out of memory?

Strange, strange problem this one. Intro: I had cycles with these 2 GPU + CPU working well for renders. Then, after some time, I took the 750ti out and continued working with only the 1070ti + CPU ...
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0answers
196 views

Why is Blender 2.78c/2.79/2.79b CUDA Rendering option not available with Nvidia GTX780Ti on Windows 8.1 OS?

Does anyone know why Blender will not show CUDA option for rendering in Blender if I use Nvidia driver later than Driver Version 388.71 released on December 20th 2017? The CUDA Compute Rating is: ...
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0answers
17 views

Blender using CPU instead of CUDA [duplicate]

I'm new to Blender, and I'm having a fairly annoying problem. I'm running a windows 7 64bits, on an i5, 8GB DDR3 RAM and a GTX 660 (2GB memory), which according to the documentation, is compatible ...
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1answer
293 views

How to get OpenCL functioning for GPU rendering, AMD GPU?

I'm running blender 2.79b and Blender won't recognize my card. AMD Radeon HD 7900 Series, GCN 1st gen architecture OpenCL™ Version: 24.20.11021.1000 Vulkan™ Driver Version: 2.0.33 Am I missing ...
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0answers
43 views

Multiple graphics cards. Is there a way to designate one as compute device only?

I recently bought 1070ti to be my main card and I also have old 1060 6GB model as a secondary card to aid Cycles rendering. I am noticing that both cards read (Display) in the Blender settings. Is ...
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0answers
26 views

Blender, was installed with dnf not support CUDA

OS. Linux Fedora 27 Today I bought GTX650Ti and connected it instead of 9600GT. I have reinstall drivers, and install CUDA packages. The fact is that Blender, downloaded as archive and unpacked can ...
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0answers
142 views

Cuda Error at cuCtxCreate: Unknown error

I am trying to get my dual GTX 1080 Ti working in Cycles, however no bingo. When I try to render a scene (just the box with nothing else in it) I get the error message “Cuda Error at cuCtxCreate: ...
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0answers
141 views

How to get an AMD GPU to work with blender?

I know this question was asked multiple times before so please excuse me. I am using Ubuntu 18.04 with Radion RX 480 graphics card. Currently my system uses open source drivers which came with ...
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1answer
114 views

Cycles using only one of 3 GPUs

I've been using 3 GTX 1080 cards for more than a year now, for Cycles rendering, but just recently, all of a sudden, Blender is only using one of them, ignoring the other 2 for rendering. I can see ...
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0answers
25 views

Will rendering on a second GPU leave rest of the system (mostly) idle?

we need some longer Cycles Renderwork to be done an found that buying a second GPU is probably a lot cheaper than renting render nodes in the cloud. We're talking about weeks of render time. The ...
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3answers
199 views

Blender is only using one tile and only on CPU

I have tried to make blender faster by using my Nvidia GeForce GPU in the user preferences window and under the render options in the properties window. But I can see in the task manager that the CPU ...
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1answer
279 views

Help with “Cuda Error: Out of memory”

can anyone help me... I just wanted to do a quick clay render to see some shadow issues but I keep getting a "Cuda Error: Out of memory" message come up. I'm running the render off of my GPU which is ...
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0answers
13 views

Cycles camera not folowing keyframes

Help, When i Render in CPU, or in OPenGL mode the camera follows keyframed positions. But when i use GPU, to render a animation the camera stays fixed on a location. from wherever i start de animation ...
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0answers
39 views

GPU Render crashes before start

Blender appears to crash while loading render kernels for F12 Render (Cycles). I don't get any error messages, and Windows 10 doesn't say that it quit 'unexpectedly' either. My GPU is an RX 380 (4GB). ...
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0answers
42 views

Why is there a huge CPU use when I render on GPU?

Today I'm rendering an animation, but when I started rendering, I noticed there is a huge CPU usage (40%-80%). It's weird because I selected GPU rendering and in options, there is also GPU selected. ...
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1answer
283 views

Does Blender support the new AMD Vega M GL graphics card? If so, how must it be configured in order to work effectively?

This is my very first post, so please forgive and correct me if I do something incorrectly. I recently purchased the new (as of May, 2018) Dell XPS 15 2-in-1 laptop which has the new Intel Core i7 ...
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0answers
112 views

GPU render error in blender 2.79 'cuda error: not found in cumodulegettexref'

Was working on a fire simulation render and upgraded to blender 2.79 so that I could get smoke and fire support for gpu renders. I'm using an nvidia geforce gtx570 graphics card, the most recent ...
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0answers
23 views

Render failure — GPU [duplicate]

So I'm trying to render using my GPU (Intel HD Graphics 4000 1536 MB on MacOS), but every time it fails. I went to the system preferences, checked "CUDA" and it selected my graphics card (so it would ...
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0answers
84 views

Cycles rendering with OpenCL keeps freezing

I've been using my AMD Graphics card for GPU rendering in Cycles for a while. I've never had problems, everything worked fine for months, until recently. When rendering with GPU, I can clearly see ...
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0answers
100 views

GPU Rendering Stopped Working

I was using GPU CUDA rendering with Cycles and it was working fine, but part way through the render it stopped working and I had to continue the render with the CPU. Now the "GPU Compute" option in ...
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1answer
211 views

Does Blender Cycles support rendering in SLI mode - two and more graphics cards?

Can we make SLI bridge between our graphics cards for a faster rendering on blender Cycles renderer? I saw on the blender version 2.79.4 we can faster render on 64*64 render tile on CPU and GPUs, ...
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0answers
20 views

Render freeze on random tile

I have Radeon Rx 580 and when i am trying to render my scene with gpu it just freezes on random tile, even have to shut Blender in processes. It's not even complicated scene to render Cpu cracked it ...
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0answers
232 views

Blender detects 2 gpu's but only renders on 1

i have 2 Gtx 1080 Ti's gpu's and both are shown in the User Preferences->System TAB but while rendering it only shows 1 tile. The issue occured some days ago and before that it worked fine with 2 ...
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1answer
50 views

Blender acts weirdly when rendering soft body physics

I've just finished an Olav3D tutorial about soft bodies but when I try to render the animation (be it in GPU or CPU) Blender crashes. Now, the first weird thing is that this happens not just in my 3-...