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William George (Product Development)

OctaneBench 2019 Performance Preview

Written on February 18, 2019 by William George

OTOY is nearing completion of OctaneBench 2019, the first version of their OctaneRender benchmark to support the new RTX technology in NVIDIA's Turing-based GeForce and Quadro video cards. We will do a full performance roundup when OB 2019 is finished, but for now I wanted to put out a quick preview of the performance increase that RTX tech can bring to GPU rendering.

Here are screenshots from the OctaneBench 2019 preview, running on four GeForce RTX 2080s. We specifically used video cards from Gigabyte with single, rear-exhaust cooling fans to avoid issues with overheating that dual-fan cards have in multi-GPU configurations.

I'm not sure if the final version of OctaneBench 2019 will retain this functionality, but this preview release runs the benchmark test both with and without RTX enabled. The speed-up from having that additional ray-tracing hardware turned on is amazing: nearly 3 times faster rendering! Here is a chart of the official numbers reported by the OctaneBench 2019 preview for these four video cards:

OctaneBench 2019 Preview RTX On RTX Off RTX Boost
Info Channels 565.53 Ms/s 120.97 Ms/s 4.67x
Direct Lighting 199.99 Ms/s 72.70 Ms/s 2.75x
Path Tracing 139.78 Ms/s 52.59 Ms/s 2.66x
Total Score 2522.13 OB 864.48 OB 2.92x

That is a massive speed-up! NVIDIA's RTX family of cards were already faster than the previous generation GeForce GTX 1000-series, but with this additional boost from RTX technology they are going to be the only logical choice for rendering workstations. Further, there will now be a strong argument for upgrading existing render systems - taking care to select cards that are properly cooled.

Lastly, eagle-eyed readers may have noticed that there is an error shown on the third screenshot in the gallery above. That was from a test run we tried with NVLink enabled across the four video cards, and OctaneBench 2019 did not like that configuration. I'm not entirely sure why that happened, but we will be sending a report of that issue over to OTOY for them to check out. As such, the succesful scores we got from the OctaneBench 2019 preview were achieved with NVLink disabled. NVLink isn't likely to improve rendering performance anyway, and in fact might add a little overhead, but it does have potential to allow working with larger and more complex scenes by pooling the graphics memory on connected cards and increasing the communication speed between them.

Tags: OTOY, Octane, Render, GPU, Rendering, NVIDIA, RTX, GeForce, 2080, Quadro, Turing, Video, Card, NVLink

So... should we expect a flood/dump of cheap used GPUs on ebay?

Posted on 2019-02-20 03:04:58

I don't know that I would expect a "flood", but I could certainly see some folks reselling their older GeForce 900 / 1000 series cards if they upgrade to the new RTX models. Rendering isn't a fad thing among individuals like crypto mining was... I think it tends to be more businesses and some individual professionals, and I think there are both fewer cards in use for this applications and also fewer users who would be in a position to switch right away, so don't expect a big bubble on the used GPU market because of this :)

Posted on 2019-02-20 17:33:58

Impressive, but to set the right expectations, OTOY also writes: „it is important to remember that RT core speed gains are currently scene specific, and in many other scenes we have tested, we are getting less than half the speed boost“ - https://render.otoy.com/for...

Posted on 2019-02-20 08:37:53

Quite correct, and thank you for helping to set proper expectations. Even still, if the speed-up is less (we saw nearly a 3x increase, so maybe something in the 1.5-2x range instead) in combination with the earlier improvements in the Turing-based RTX cards over the older Pascal generation cards it will still be a sizeable performance boost.

Posted on 2019-02-20 17:38:30