Meet the new, tougher Cinebench R20 benchmark: We test it on Xeon and Threadripper

Long a favorite of reviewers, Maxon's Cinebench R20 just got a big update.

Credit: IDG

Maxon’s popular Cinebench CPU benchmarking program just got a long-overdue update to bring it up to parity with modern PCs. We’ve already tried it, on two of the most powerful CPUs you can buy today, and have results to share, along with some historical context and tips for using it with your own CPU. 

A little Cinebench history

The free Cinebench R20 app is intended to replace Cinebench R15, which first saw service in 2013. To give you an idea of how far we’ve come in hardware, the top-end desktop CPU in 2013 was a quad-core, 4th-gen Haswell Core i7, while an enthusiast-level chip was a six-core 3rd-gen Ivy Bridge-E Core i7.

Today, Intel’s top-cat consumer CPU is the Core i9-9980XE (available on Amazon) with 18 cores. And although not really intended for consumers without the bank account of Bill Gates, the company also just pushed a 28-core Xeon W-3175X.

AMD, meanwhile, is making 8-core CPUs rain and offers a 32-core Threadripper 2990WX for high-end consumers at a crazy-reasonable price.

cinebenchr20running IDG

Maxon’s new Cinebench R20 running through its paces on a 28-core Xeon W-3175X.

To keep Cinebench R20 more relevant, the company has increased the workload complexity, increased memory use, and adopted the latest rendering engine from the product it’s based on: Cinema 4D R20. The engine itself features support for Intel’s Embree raytracing technology, which has also been adopted by Valve, AutoDesk, UbiSoft, V-ray, Blender, and Corona, among others. Under the hood, the R20 engine supports AVX, AVX2, and AVX512 instruction sets. Because we can never have enough, the benchmark now supports up to 256 render threads.

Benchmark politics

Maxon’s Cinebench refresh arrives with some historical baggage. At one point, previous versions of Cinebench had been tainted by accusations that it hobbled AMD performance by using the Intel compiler, which favored Intel’s CPUs over AMD’s. Maxon, however, denied this and told PCWorld in 2017 that despite what the FTC maintained, it didn’t use the infamous “CPU ID” options that favored Intel chips.

It’s all water under the bridge now, as AMD itself used Cinebench R15 to demonstrate just how fast its Ryzen CPUs were. Maxon claims all is peace and harmony. “Maxon also works very closely with Intel and AMD to test Cinebench on not only the most recent CPUs but the next generation as well. This allows Maxon and Cinema 4D to stay on the cutting edge and deliver the performance required to satisfy the top production companies,” Maxon officials told us.

cinebench r20 store IDG

Cinebench R20 will only be available in the store

Windows Store only

One thing that’s certain to raise some blood pressure is how you can—and can’t—get Cinebench. Previously, anyone could download Cinebench R15 and install it as a standalone Win32 app. With Cinebench R20, the free benchmark can only be downloaded directly through the Windows Store. (Cinebench R15 remained unchanged for years, with the only update coming after Apple broke the installer on MacOS.)

You don’t have to log in or create a Windows Store account to install it. But you do need Internet access, and you don’t have any control over versions. If Cinebench R20.1 came out in six months, it could invalidate your previous tests, because you can’t run the older version.

We asked Maxon officials about a standalone installer, and the answer wasn’t encouraging. “It’s doubtful Maxon will be releasing a standalone Win32 installer version at this time. Cineware is a derivative of Maxon’s flagship product Cinema 4D, used to create ‘high-end’ 3D animation,” Maxon officials told PCWorld. “Cineware is meant to test the hardware and OS artists will actually be using in production. Creatives are constantly pushing the boundaries of hardware and OS performance. Therefore, Cinebench too must push those boundaries in order to provide accurate comparisons.”

While the constant updates will annoy professional reviewers, there’s another issue that will rankle even more. Maxon forbids benchmarking websites from posting stand-alone versions of the test. It's UWP or bust. 

Cinebench R20 on 28-core Xeon W-3175X and 32-core Threadripper 2990WX

Make no mistake, Cinebench R20 is a big change--a tougher test for today's faster CPUs. To see how big a difference it makes, we fired up a 28-core Xeon W-3175X and a 32-core Threadripper 2990WX to test on both Cinebench R15 and Cinebench R20.

Like Cinebench R15, Cinebench R20 features a single static scene that is rendered out. In the chart below, you see the performance of the 32-core Threadripper 2990WX and the performance in red, and Intel's Xeon W-3175X in blue. The shorter bars are Cinebench R15 (also freshly run on the machines), while the longer bars are Cinebench R20.

With Cinebench R15, the Xeon W-3175X clocks in just under 3.6 percent faster. We’d call that a tie mostly. With Cinebench R20, the margin increases to just under 10 percent in favor of the 28-core Xeon W-3175X. That’s a decent uptick in performance for the Xeon over Threadripper. When you remember that the Xeon has 28 cores vs. the Threadripper’s 32, it’s not a great look for Threadripper.

cinebench r20 nt IDG

The 32 cores of the Threadripper 2990WX make it damn near even with the higher-clocked 28-core Xeon W-3175X in the much older Cinebench R15. Move to Cinebench R20, and the gap opens considerably.

That’s just the default test, using all of the CPU cores available. We also ran the test’s optional single-threaded test. Cinebench R20 surprisingly puts the Threadripper 2990WX slightly ahead by about 2 percent—which again—is well within the margin of error, and what we’d consider a tie. Still, that’s a decent swing from Cinebench R15, which put the Xeon W-3175X ahead by just under 10 percent.

cinebench r20 1t IDG

Single-threaded performance of the Xeon W-3175X drops back a bit with Cinebench R20, but we’d probably call it a tie.

We’re actually surprised by the score here, as we thought the higher clock speeds of the Xeon W-3175X would easily put it ahead. It’s possible the Xeon’s performance actually loses some ground in single-threaded tests when AVX, AVX2 or AVX512 is used, as Intel allows the CPU to shift down for the more difficult AVX workloads.

Maxon said the test increases the computational workload eightfold. In casual observation, we noted about 5GB of RAM being used during runs on both machines. Power consumption didn’t seem to change much: Both systems hit similar peaks between Cinebench R15 and Cinebench R20.

Total time to run on the 28-core Xeon W-3175X was about 29 seconds, while the 32-core Threadripper 2990WX took about 32 seconds. For comparison, Cinebench R15 runs on the Xeon and Threadripper took about 9 seconds, respectively.

Goodbye, OpenGL

One last thing we should note is how the new version jettisons OpenGL performance testing. That’s a small loss, as OpenGL on consumer-level graphics cards in Windows has always been lackluster. For those who want to measure OpenGL GPU performance, other tests will do a better job.

cinebench options IDG

You can essentially loop Cinebench by selecting a minimum run time for the test and selecting a custom number of cores to test.

How to run Cinebench R20

If you’re ready to dip your toes into the testing waters, Cinebench R20 is a great start. To install it, simply go to the Windows Store and search for “Cinebench,” and install it.

Once installed, you should reboot your machine, and disconnect it from the network to prevent it from updating in the background. It’s also recommended that you disable or pause virus testing, and shut down other applications to prevent them from influencing the score.

When ready, fire up Cinebench from the Start menu and push the Run button. You should run the test at least three times and average all three if you’re looking for more reliable results. If you’re looking for pure performance runs, give the machine a minute or two between runs (consider even longer rest periods on a laptop.)

To measure single-core performance, select File > Advanced benchmark, which will reveal a button for CPU (Single Core).

To stress-test your system, go into File > Preferences and set a Minimum Test Duration. Set, say, 3,600 seconds, and Cinebench R20 will loop the workload on the given amount of threads for an hour.

Xeon W-3175X 28-core Intel CPU Gordon Mah Ung

Interpreting Cinebench R20 results

When talking about the results you get from a 3D rendering test, you should put it in the proper perspective. Cinebench R20 is a test to measure how a computer (Windows 10 or MacOS) renders 3D using the latest CPU instruction sets. It’s not a GPU test. It’s not an SSD test. It’s almost purely a CPU test that tells you how a PC will perform rendering 3D models.

That doesn’t necessarily tell you how a PC will operate in Microsoft Office or Google Chrome or even Photoshop, because very few consumer-level applications will actually scale to the number of cores available today.

Still, as a tool to measure approximate levels of performance under multi-threaded loads (and single-threaded loads) it’s a repeatable, reliable test and a welcome update from Cinebench R15.

cinebench thread scaling xeon w 3175x IDG

We like to use Cinebench R15 (and probably now R20) to give us an idea of performance across different amount of CPU cores.

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Gordon Mah Ung

Gordon Mah Ung

PC World (US online)
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