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  5. Redshift 2.6.22: NVIDIA Titan RTX Performance

Redshift 2.6.22: NVIDIA Titan RTX Performance

Posted on January 14, 2019 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 Some of the content in this article is most likely out of date, as it was written on January 14, 2019. For newer information, see our more recent articles.

Table of Contents

  • Introduction
  • Test Setup
  • Benchmark Results
  • Analysis
  • What Are the Best GPUs for Rendering in Redshift?

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 recently looked at how the new GeForce RTX cards perform in this renderer, but now the Titan RTX is out with a staggering 24GB of video memory onboard. That sounds great for rendering large and complex 3D scenes, but how does it actually perform? And are there any caveats?

Test Setup

At publishing time, the latest version of Redshift is 2.6.31 – but we are still using 2.6.22 for internal testing. The differences between these minor revisions are mostly bug fixes, rather than things which would impact performance, and with how often Redshift is updated we try to only change when more major version releases happen. I fully expect the results we got to be applicable across 2.6.X releases.

For our test platform this time around, we wanted to use what we recommend to folks looking for a multi-GPU rendering workstation. That means a board and processor capable of running four video cards, with high clock speed being a bigger factor that core count – and also minimizing the cost of the CPU, so that funds can be focused on getting the most powerful GPUs instead. That combination leads naturally to a Xeon W based system, with the quad-core Xeon W-2125, ECC memory, and a fast SSD to avoid potential bottlenecks.

If you would like full details on the hardware configuration we used for this round of testing, 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 16GB ECC Reg (128GB total)
GPU: NVIDIA GeForce GTX 1070 Ti 8GB
NVIDIA GeForce GTX 1080 Ti 11GB
NVIDIA Titan Xp 12GB
NVIDIA Titan V 12GB
NVIDIA GeForce RTX 2070 8GB
NVIDIA GeForce RTX 2080 8GB
NVIDIA GeForce RTX 2080 Ti 11GB
NVIDIA Titan RTX 24GB
Hard Drive: Samsung 960 Pro 1TB M.2 PCI-E x4 NVMe SSD
OS: Windows 10 Pro 64-bit
PSU: EVGA 1600W P2
Software: Redshift 2.6.22 Demo Benchmark (Age of Vultures scene)

Benchmark Results

Here are the Redshift 2.6.22 benchmark render times each of the video cards we tested, sorted from fastest to slowest, with the new Titan RTX highlighted in darker green:

Redshift 2.6.22 Benchmark Titan RTX Performance Comparison

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

Redshift 2.6.22 Benchmark Titan RTX Performance as Percentage Compared to GTX 1080 Ti

Analysis

The new Titan RTX took the top performance spot in this round-up, passing even the more expensive Titan V. As a single card it looks to be a fantastic choice for GPU based rendering, but the problem is that it is limited to one or maybe two cards at most in a system.

Why is that? NVIDIA started using dual-fan coolers on their RTX series (both GeForce and this Titan model). Using dual fans means a single card stays cooler and quieter than a more traditional, single-fan design – but it also means greatly increased heat within the computer, which is compounded with each additional card. Most systems can handle the heat from one GPU, and some can handle two with high airflow fans and ample space between the two cards, but beyond that there is just too much heat inside and the fans on the video cards start recycling that hot air which can no longer properly cool the cards – leading to overheating and throttling. Unfortunately, it looks like the Titan RTX is only built by NVIDIA directly… meaning there are no 3rd party models with different cooling layouts.

What Are the Best GPUs for Rendering in Redshift?

Because of the Titan RTX's fan layout, the Titan V is still the fastest card that can be effectively used in multi-GPU configurations.

The RTX 2080 Ti is not far behind, though, and costs far less – so those are probably the best option right now, as long as you use single-fan models. If you need more video memory, to rival the 24GB that comes on the Titan RTX, NVIDIA's Quadro RTX 6000 should have similar performance and is equipped with the right type of cooler… but is also substantially more expensive.

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Tags: 1070 Ti, 1080 Ti, 2080, 2080 Ti, Benchmark, Card, GeForce, GPU, GTX, NVIDIA, Pascal, Performance, Redshift, Rendering, RTX, Titan, Turing, Video, Volta

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