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  1. Home
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  5. Redshift 2.6.11 GPU Performance Comparison

Redshift 2.6.11 GPU Performance Comparison

Posted on June 19, 2018 by William George
Always look at the date when you read an article. Some of the content in this article is most likely out of date, as it was written on June 19, 2018. For newer information, see our more recent articles.

Table of Contents

  • Introduction
  • Test Setup
  • Benchmark Results
  • Analysis
  • Conclusion

Introduction

Redshift is a production-quality, GPU-accelerated renderer. Traditionally this type of rendering was done on CPUs, but graphics processors (GPUs) are ideal for highly parallel tasks like this – and it is easier to fit multiple video cards in a single computer, to boost performance, than multiple CPUs.

We've already looked at how well Redshift scales across multiple video cards, but how do individual cards compare to each other? Since it uses CUDA, only NVIDIA graphics cards are compatible with Redshift – but that still leaves a wide range of GeForce and Titan video cards to look at.

Test Setup

At publishing time, the latest version of Redshift is 2.6.11. The 2.6 release brought with it support for NVIDIA's Volta GPU architecture, so at the top-end of our test we will have the still-new Titan V. Along with that monster card, we have the previous-generation Titan Xp – based on the Pascal architecture – and a several GeForce 1000-series cards based on that same technology. To measure how fast each of these cards can render, we ran the benchmark included in the demo version of Redshift 2.6.11.

For our test platform, we wanted to use a high clock speed processor so that the video cards could really shine. Even though we aren't testing multiple GPUs We also needed a platform that would support as many video cards as possible in a large tower workstation. Given that combination of goals, the configuration which made the most sense was Intel's Xeon W – specifically, the W-2125 processor on a Gigabyte MW51-HP0 board. That provided the right PCI-Express slot layout for up to four GPUs, and the Xeon W-2125 runs fast: 4.0GHz base and up to 4.5GHz turbo.

If you would like full details on the hardware configuration we tested on, just click here to expand a detailed list.

Testing Hardware
Motherboard: Gigabyte MW51-HP0
CPU: Intel Xeon W-2125 4.0GHz (4.5GHz Turbo) 4 Core
RAM: 8x Kingston DDR4-2666 32GB ECC Reg (256GB total)
GPU: NVIDIA GeForce GTX 1060 6GB
NVIDIA GeForce GTX 1070 8GB
NVIDIA GeForce GTX 1070 Ti 8GB
NVIDIA GeForce GTX 1080 8GB
NVIDIA GeForce GTX 1080 Ti 11GB
NVIDIA Titan Xp 12GB
NVIDIA Titan V 12GB
Hard Drive: Samsung 960 Pro 1TB M.2 PCI-E x4 NVMe SSD
OS: Windows 10 Pro 64-bit
PSU: EVGA SuperNova 1600W P2
Software: Redshift 2.6.11 Demo Benchmark (Age of Vultures scene)

Benchmark Results

Here are the Redshift 2.6.11 benchmark render times each of the video cards we tested:

Redshift 2.6.11 Benchmark Titan V, Titan Xp, GeForce GTX 1080 Ti, GTX 1080, GTX 1070 Ti, GTX 1070, and GTX 1060 GPU Performance Comparison

And here is another way of looking at the results, as percentages relative to the GeForce GTX 1080 Ti's performance:

Redshift 2.6.11 Benchmark Titan V, Titan Xp, GeForce GTX 1080 Ti, GTX 1080, GTX 1070 Ti, GTX 1070, and GTX 1060 GPU Performance as Percentage Compared to GTX 1080 Ti Result

Analysis

It is a little tricky to interpret raw benchmark times into actionable information, as in the first graph above, but the second chart makes things much clearer. The Titan V is about half again as fast as the GTX 1080 Ti – or to put it another way, 50% faster than the 1080 Ti. The Titan Xp is also faster than the 1080 Ti, though only by about 13%.

Looking further down the charts, the 1070 Ti beat the 1080 in an unexpected upset. GPU pricing is volatile these days, but the 1070 Ti usually costs a bit less than the older 1080 – so having better performance at a lower price is a nice surprise. That makes the 1070 Ti a good value if you need to save money, but keep in mind that it has less VRAM than the 1080 Ti and Titan cards (which limits scene size).

Keep in mind that these are single-card scores, though, and doubling (or tripling/quadrupling) up on a lower-end card will still give impressive results. For example, two GTX 1070 cards (not the Ti versions!) should be faster in Redshift than a single 1080 Ti. Two 1080 Ti cards, in turn, will also outpace a single Titan V… and cost less, too!

Conclusion

As expected, now that it is supported, the Titan V is by far the fastest GPU for rendering in Redshift – at least without crossing over to the even more costly Quadro GV100 or Telsa V100 territory. The Titan Xp, GTX 1080 Ti, and other cards also do well, though, especially when considering how much less they cost. Thanks to good multi-GPU performance scaling, stacking several of those cards would outperform a single Titan V. However, if you want the absolute best performance, multiple Titan Vs is the way to go.

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Tags: 1080 Ti, Benchmark, Card, GeForce, GPU, Intel, Multi, NVIDIA, Performance, Redshift, Rendering, Scaling, Video, Xeon W

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