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  5. V-Ray CPU Rendering: AMD Threadripper 2990WX Takes the Single CPU Performance Crown

V-Ray CPU Rendering: AMD Threadripper 2990WX Takes the Single CPU Performance Crown

Posted on August 13, 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 Some of the content in this article is most likely out of date, as it was written on August 13, 2018. For newer information, see V-Ray CPU Rendering: AMD Threadripper 2990WX Takes the Single CPU Performance Crown

Table of Contents

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

Introduction

V-Ray, from Chaos Group, is a widely used rendering engine for creating realistic 3D graphics. It includes two versions: one for rendering entirely on the CPU and the other for rendering on NVIDIA GPUs. The GPU version mostly depends on how many of which video cards are in a given workstation, with little regard for other system specs, but the CPU version is heavily impacted by both the processor's clock speed and core count.

Chaos Group also publishes a benchmark utility for V-Ray, which can test both CPU and GPU performance. This is a fantastic utility for comparing different processors and video cards, and we run it here at Puget Systems on every workstation we build. We also run it on new and upcoming hardware in Labs, to see how well various components should perform with V-Ray rendering. For this article, we used it to measure CPU-based rendering performance on AMD's new Threadripper 2 processor: the 32-core 2990WX.

AMD Ryzen Threadripper CPUs

Test Setup

This is AMD's second generation of processors in the Threadripper line, so to see how it performs in V-Ray we are also taking a look at the flagship of the first generation: the 16-core 1950X. For comparison we've also got several models from Intel's Core i7 and i9 series, as well as a few dual-CPU configurations using the Xeon Scalable line. Some of these results were pulled from previous V-Ray articles.

All of those CPUs were run through the free V-Ray Benchmark utility, in CPU mode. If you would like more details about the full hardware configurations involved in these tests, click here to expand the following section.

Comparison Systems
Motherboard: Gigabyte Z370 AORUS 5 Gigabyte X299 Designare MSI MEG X399 Creation
CPU: Intel Core i7 8700K 3.7GHz
(4.7GHz Turbo) 6 Core
Intel Core i7 7820X 3.6GHz
(4.3/4.5GHz Turbo) 8 Core

Intel Core i9 7900X 3.3GHz
(4.3/4.5GHz Turbo) 10 Core

Intel Core i9 7940X 3.1GHz
(4.3/4.4GHz Turbo) 14 Core

Intel Core i9 7980XE 2.6GHz
(4.2/4.4GHz Turbo) 18 Core
AMD Threadripper 1950X 3.4GHz
(4.0GHz Turbo) 16 Core

AMD Threadripper 2990WX 3.0GHz
(4.2GHz Turbo) 32 Core
RAM: 4x Crucial DDR4-2666 16GB
(64GB total)
8x Crucial DDR4-2666 16GB
(128GB total)
GPU: NVIDIA GeForce GTX 1080 Ti 11GB
Storage Drive: Samsung 960 Pro M.2 PCI-E x4 NVMe SSD
OS: Windows 10 Pro 64-bit
Software: V-Ray Benchmark 1.0.8
Xeon Scalable Platform
Motherboard: ASUS WS C621E SAGE
CPUs: 2x Intel Xeon Gold 5122 3.6GHz (3.7GHz Turbo) 4 Core
2x Intel Xeon Gold 6136 3.0GHz (3.7GHz Turbo) 12 Core
2x Intel Xeon Gold 6148 2.4GHz (3.7GHz Turbo) 20 Core
2x Intel Xeon Gold 6154 3.0GHz (3.7GHz Turbo) 18 Core
2x Intel Xeon Platinum 8180 2.5GHz (3.8GHz Turbo) 28 Core
RAM: 12x Crucial DDR4-2666 ECC Registered 32GB (384GB total)
GPU: NVIDIA GeForce GTX 1080 Ti 11GB
Storage Drive: Samsung 960 Pro M.2 PCI-E x4 NVMe SSD
OS: Windows 10 Pro 64-bit
Software: V-Ray Benchmark 1.0.8

Benchmark Results

Here are the results for the various individual CPUs we tested in V-Ray Benchmark 1.0.8, with AMD models in red and Intel in blue:

V-Ray CPU Benchmark 1.0.8 AMD Threadripper vs Intel Core i7 and i9 Processors

To avoid too complex of a chart, we separated out the dual-CPU Xeon results. They are shown below, with the same single-CPU AMD Threadripper chips in red again – and, of course, Intel's Xeons in blue:

V-Ray CPU Benchmark 1.0.8 AMD Threadripper vs Dual Intel Xeon Scalable Processors

Analysis

AMD's new Threadripper 2990WX gives an amazingly good performance in V-Ray! That first chart shows it taking 46% less time to complete a render compared to Intel's Core i9 7980XE, even though the 2990WX costs 10% less ($1799 vs $1999) than Intel's flagship. It also beats the previous-generation Threadripper 1950X by about 72%.

Looking at the second chart, Intel can take back the absolute performance crown by ramping up to two physical CPUs with the Xeon Scalable series… but that doesn't tell the whole story. Yes, a pair of Xeon Gold 6148 chips will outpace a single 2990WX from AMD – but those Xeon processors costs over $3000 MSRP each! The less costly pair of Xeon Gold 6136 chips was actually slower than the 2990WX, even though they still cost over $2000 each – making them more than twice the price of AMD's faster solution, and that is before you factor in a larger and more expensive motherboard, case, power supply, etc.

Conclusion

As demonstrated above, the new AMD Threadripper 2 processor takes the crown for top single-socket performance in V-Ray's CPU benchmark. Not only is the 2990WX the fastest single-processor solution, it is also less expensive than many slower options from Intel (both on the single- and dual-CPU sides). This is a bit of a niche, where all 32 cores in this chip are fully utilized, but for CPU-based rendering, the only way to beat AMD's Threadripper 2990WX at this point in time is by spending many thousands of dollars more.

You can see the specific configurations we recommend for V-Ray (both CPU and GPU engines) below. The 1 CPU / 1-4 GPU variant uses AMD's Threadripper processors and should be updated to offer the 2990WX once it passes our hardware qualification process.

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Tags: AMD, Chaos, Core, CPU, Group, i7, i9, Intel, Performance, Processor, Rendering, Scalable, Threadripper, Threadripper 2, V-Ray, Xeon

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