Rendering GPU vs CPU | Test and Review

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Hey Guys! here is a small video covering this very interesting topic, we put both to the test and find how they each compare. Enjoy!

[ChristopherGray]

Really great video but i have some corrections (not that it's really much of your fault i'm just a programmer):

1.OptiX is a raytracing API, not a GPU compute API, which is what CUDA is, AMD's equivalent to this is OpenCL.

2. GPU's are not "less exact" at computing, they are simply just highly specialized at 3D computations, such as geometric calculations, rotation and calculation of verticies, programmable shaders, and much more.

3. The difference between a CPU and GPU is that a CPU is a general processor, it has a wide range of possible instructions that it can execute fast, it is a jack of all trades in a sense, it is also far more sequential due to the fact that it has less cores, typically 8 to 12.

In contrast, a GPU has literally thousands of cores and computes MANY more tasks at the same exact time in parallel.

[PsychoBenches]

11:07 I love they way you used that analogy to explain the difference between the GPU and CPU cores. Very good teacher

[Ab]

I think you had the denoiser on, which effects the output. A better comparison would have been with the denoiser off so you can see the raw rendered images. The denoiser always gives weird blury artefacts if there aren’t enough samples. Which can be acceptable for stills, but animation it just looks terrible

[Ab]

Another big factor is memory, which is needed for big scenes. System memory is much larger, cheaper, and upgradable. GPU memory is fixed and much more limited. Some gpu renderers have out of core memory algorithms where they are constantly shifting data in and out of the gpu to compensate for this limitation, but at a performance cost.

[jonnno]

Have you also done a comparision with moving images?

[enduga]

Is it still the case with laptops that cpu will give better results than gpu?

[Arcade-XXX]

Bro that was really helpful and helped me to save more money and spent it on other stuff of my computer!! THANKS A LOT ❤🙏🙏

[NathanSefrin]

So if you let the cpu do all the render samples, will it eventually get the detain that the gpu had, but adding the better calculated light and all that?

[luten]

why u did'nt compare a gpu price with a cpu with equal performances?

[GraveUypo]

cuda is slower than optix, and you should save as PNG, not a lossy format like jpg, when comparing image quality.

[oscarcampbellhobson]

Is this just octane or would it be the same with say Arnold?

[ricbattaglia]

Thanks, very interesting! For 3ds Max which is the best gpu or cpu configuration? Thanks a lot.

[roshelgaming]

Hi can you do rigging and animation course for beginner in blender. Same like the Maya course

[brandonjacksoon]

Question: do you have a course or tutorial for the concept and models you used for this video in Bender?

[filthygarbage]

i use 3ds max and vray, a lot of materials does not support gpu rendering which kinda sucks

[Itsme-wtgu]

Can you make cpu vs gpu particle in ue4

[devformation]

thank you! very interesting information!

[godnyx]

Similar thing is seem for video rendering. GPUs render it faster, but the results are worse quality than the CPU version.

It turns out that GPUs are only *TRULY* useful for 3D and that's where they should be preferred and used!

[achiramoto]

"CPU is precise and slow and GPU is brute and fast" is an old statement.
All the render engines nowdays favors the GPU and multi GPU systems.
Need to say, that even on GPU rendering, the CPU still do a lot of work. But if you let you CPU to the job alone, better go on vacation, don't need to wait 1 week for your 8K render...

[Deezsirrer]

This is why Hollywood used layers So you can render 8k textures and 4096 samples with all refraction materials without involving gpu predictions painting all those shit at once Mostly the reason Why your render so flickery bubbles cause it's not precisely accurate