3
$\begingroup$

I read everywhere that render farms have dual Xeon processors with some 30-odd cores to render complex scenes, but I also read about powerful workstations that contained a rendering GPU like something a Quadro.

My question is, which one actually performs better in Cycles? And what will surpass my overclocked 980Ti? (I will do rendering benchmarks if you wish)

$\endgroup$
8
  • 1
    $\begingroup$ A Quadro card will not be faster than your gtx GPU. But several of them will... The big advantage of render farms is that even if they take a bit longer than it would take you to render one frame, you can render a bunch of frames simultaneously, as opposed to one by one on your machine. Make a test and see what works for your particular scene. $\endgroup$
    – user1853
    Feb 13, 2016 at 0:28
  • $\begingroup$ @cegaton I forgot to mention that I don't own a Xeon machine. However, hearing that Quadros can't beat my GTX, I may look into building a farm then :) $\endgroup$
    – Pyroglyph
    Feb 13, 2016 at 0:58
  • 1
    $\begingroup$ @cegaton The general statement that "A Quadro card will not be faster than your gtx GPU" isn't really true,. For the same price a gtx will probably outperform a Quadro in Cycles (definitely not in other 3D software though). But I can pretty much guarantee you that a m5000 or m6000 will outperform the 980ti. (Note that CPU rendering has the advantage that new features come out for CPU first, then they get them working on CUDA.) $\endgroup$
    – PGmath
    Feb 13, 2016 at 1:39
  • $\begingroup$ I think you might get better answers to this question at Hardware Recommendatons Stack Exchange, even if it is still in Beta. $\endgroup$
    – brasshat
    Feb 13, 2016 at 3:50
  • 1
    $\begingroup$ Remember that the crucial difference between GPU and CPU is the fact that complex scenes will almost always run out of memory on GPU. Multiple EXRs as textures and such will flatline a GPU fast. $\endgroup$
    – troy_s
    Feb 13, 2016 at 15:43

3 Answers 3

3
$\begingroup$

I use Blender at work. This might help you out.

My work computer used to be a Mac Pro with a hyper-threaded Xeon processor. It was a little older, like from 2010, but it could run 16 simultaneous threads. That translated to 16 little squares rendering at the same time in Cycles.

A year and a half ago I asked my boss if I could build a PC instead of getting a new Mac Pro. They approved and gave me a budget of \$3500, roughly the amount a new Mac Pro would have cost. Because I was choosing my components I bought two GTX 980s (they were about \$550 a piece, so \$1100 total).

When I compared the Cycles rendering speed on the two computers, the PC I built rendered the same scene SIXTY TIMES FASTER than the Mac Pro with the Xeon processor. That meant projects that used to take multiple week to render would now be done over night.

I used Render.st once. It was a very smooth experience, and didn't cost me anything because they had given me a \$25 credit to get started. It wasn't blazing fast, but it did render for much less money than the cost of building and maintaining my computer. And like Pyroglyph mentioned, all the frames began and ended around the same time.

If you are rendering things every now and then, for fun, I suggest trying a render service like Render.st. It's very easy to set up.

$\endgroup$
2
$\begingroup$

I realize I'm coming a bit late to the party, but I've just noticed the thread and I'd like to make a couple of comments:

NVidia has 3 lines of GPUs : GTX (consumer cards, targeted towards gaming), Quadro (targeted towards CAD professionals) and Tesla (GPU processors for HPC). For Cycles, you'll definitely get the best bang for the buck with a card from the GTX line. However, if you're working on very complex projects, high-end CPUs may perform better. There are a number of reasons for which this could be happening, like for instance parts of the rendering code not being optimized enough for GPU (take volumetrics for example) and the actual way the computing process works at a GPU level. You can see the Blender Institute benchmarks on a number of systems here if you're interested in comparing results. And I've seen situations in which our dual Xeon servers performed far better than our quad GPU ones. So my advice to anyone looking to buy hardware would be to keep in mind the complexity of the projects you'll be working on.

Regarding the way a render farm works, the hardware we're rendering on at RenderStreet is pretty fast - both the CPU and the GPU servers. But the true power of the farm is that we're able to throw dozens or hundreds of identical servers at your projects and render in a couple of hours what you would render in a few weeks on one machine.

And lastly, using a farm isn't that expensive, either. For instance, the price Tim mentioned for one GTX card can buy 11 months of unlimited rendering, and that's a lot of crunching power. Plus, it's available from anywhere you are traveling, with the only requirement being a decent internet connection.

$\endgroup$
1
$\begingroup$

Check out this page for GPU render performance Benchmarks across some popular 3D Software Render Engines. It doesn't Include Cycles, but gives a good comparison of how the currently modern GPUs rank

Dual Xeon wouldn't be the way to go for cycles, as this Render Engine is heavily GPU optimized. If you were to go CPU-Rendering style, I would recommend a Threadripper, as these have much better Render Performance per Cost. There is a good overview here for best CPUs for rendering.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.