Iray Render Time Comparison w/ GTX-1070
ebergerly
Posts: 3,255
This may be old news to you guys, but I did a render comparison with my new GTX-1070 card. My computer is a Dell XPS-8900, with an i7-6700; 3.4GHz; and 8 logical processors. It came with a fairly (well, actually totally ) useless GT-730 video card.
I have a DAZ Studio indoor scene with all Iray materials, and I had two G3 characters. I think I'm using fairly stock render settings, though I think I set the path length at 16.
So here are the results I obtained on the same scene:
CPU Only: 2 hours, 15 minutes
CPU + GTX-1070: 31 minutes (4,600 Iray iterations, FWIW)
GTX-1070 Only: 33 minutes
So I guess the bottom line is the GTX-1070 shaved about 1 hour, 45 minutes off my render. And what's interesting is that adding the 8 logical CPU processors made virtually no difference, while pegging all the processors which made it difficult to use the computer while rendering.
By the way, I decided to spend $75 on a new 750 watt Corsair power supply, since you're supposed to have at least a 500watt supply, and the stock PS with the Dell is 460watts. But from everything I've read, 500watts is very exaggerated, and the tests I saw didn't get much past 250watts with a GTX-1070. Better safe than sorry I guess.
Anyway, I'm thrilled with this graphics card. Waiting over 2 hours for a render isn't something I want to do.
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Comments
Oh, and with Optix Prime Acceleration checked I shaved a few minutes off the fastest time.....27 minutes total...
Just the stock lighting that comes with the Vanity Room scene from the DAZ store. I think it's got an HDR for the light from outside the windows, as well as internal bulb light/emission-type stuff. HDR doesn't really apply for inside lighting correct? You still need all the bounce light off the walls and floors and mirrors and stuff.
has anyone put together a test scene using just items from the included stuff with the program...
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a scene file of that should be openable with anybodys program... (like the daz tutorial scene...
using that for a benchmark... so everyone did a run with a standard item would give us a good set of info to compare items...
Very similar to my numbers. I now render without the CPU, which will help the machine last longer. CPUs on consumer PCs are not meant to be run at 100% for long periods of the time.
These timings go to reinforce the notion that Iray may not distribute the work load based on processor availability, but rather attempt to distribute the iterations more evenly across the available processes. When one processor is much slower than the others, it has the effect of "slowing down" the others. What would be telling is if you checked the log afterward and compared the number of iterations by each device. Obviously the 1070 will be involved in fewer iterations, but the distribution suggests Iray is trying to "spread out" the workload, and with the processors being so unbalanced, it doesn't really pay to do it that way.
Yeah, HDRI is fast for outdoor scenes,but you can't use them very effictively indoors to render Iray. I would recommend Iray ghost light or make your own mesh light and learn how to make them invisable they do work great. I have used some shader iray emitters with geometry primitives and make them into lights that were invisible to the camera and they work great indoors. Oh, I have multiple 1070's and they render Iray great. Used in conjuction with the plugin that lets you know how big your scene is and the plugin that lets you shrink your textures or use shader the 8gb version Nvidia 1070 is the video card to beat. Sure 1080ti and titan x have 12gb but they are too expensive bang for buck the 1070 is hard to beat.
I have a Dell XPS 8930 and just got a new GXT 1070 card (the 1050ti card was not adequate).
Can you verify what drivers you are using? Since putting in the 1070 I cannot render and my entire computer goes unresponsive. Any other tricks or pointers?
Thank you.
I recall way back last year when I did this I had a problem with the Dell XPS when I stuck the GTX-1070 in the computer with the existing GT-730. It didn't work. I ended up completely uninstalling the NVIDIA drivers using Display Driver Uninstaller (DDU), a free software. Maybe give that a try...
Could you use your GT-730 to drive the display? I have a GTX 1070 and a 970 - the 970 has a VRAM fault which only shows up when using it for IRay so I demoted that to being my display GPU and bought the 1070 for IRay.