The SPECwpc subcommittee has announced a new version of the SPECworkstation 3 benchmark for workstations to accommodate processors with more than 64 threads. That move certainly benefits the only workstation-class x86 processor with more than 64 threads in a single socket: AMD's monstrous 64-core 128-thread Threadripper 3990X. We decided to put the new release to the test to see the full threaded might of the 3990X in action, and the results are impressive.

Upsetting the semiconductor industry is hard, particularly when you're fighting an entrenched and much-larger rival, and sometimes things get broken when you're redefining an industry. In AMD's case, those broken things consist of operating systems and applications that weren't tuned to extract the full performance of its fledgling first-gen Zen architecture, let alone the core-heavy designs of Zen 2. The 64-core 128-thread Threadripper 3990X is the best example because it more than doubles the number of cores available with Intel's halo workstation parts and sets an entirely new bar for single-socket systems.

The 3990X exposes just how unprepared applications and software are for a 128-thread beast: Windows 10 splits cores up into 'processor groups' of 64 threads apiece, so some applications and benchmarks that aren't tuned to span across the groups don't benefit from the increased thread count.

Image 1 of 2 (Image credit: Tom's Hardware) Image 2 of 2 (Image credit: Tom's Hardware)

Aside from the obvious performance loss in unoptimized applications, this is important because the problem has the knock-on effect of impacting industry benchmarks and applications that are used to quantify performance for OEMs, ODMs, and end customers. These benchmark results, like the ones developed and maintained by the non-profit Standard Performance Evaluation Corporation (SPEC), are submitted by companies that buy the benchmark ($5,000 for the tests in question), and then submit the results to SPEC. The committee charges a $500 to $1,000 fee to verify each result and then publish it in its database.

These benchmarks are verified and maintained by an official group comprised of industry leaders, so the test results help guide the development dollars and purchasing decisions for OxMs, like Dell, HP, and Lenovo (among others), and corporate customers alike. As a result, positioning a product in the best and most accurate light possible is critical for sales to professional organizations that comprise the target market for the Threadripper 3990X.

Press and end users, like yourself, that "aren't affiliated with a for-profit entity that sells computers in the commercial marketplace" can use the benchmarks for free, so you can download the tests and use them yourself today.

We test with the SPECworkstation 3 suite for our own tests of workstation-class processors (but we don't submit them to the official body), and noted in our recent review that many of the SPEC benchmarks we typically use didn't scale correctly across processor groups. In fact, most of the benchmarks only operated at half of the potential performance, and some results were unusable. That could present an issue for AMD with some professional customers because the benchmarks aren't representative of the 3990X's true performance and potential.

However, the alterations to the existing SPECworkstation 3 benchmark allow the tests to scale correctly across different processor groups (and multi-socket systems) as of the new version V3.0.4, which has an enhanced version of the multi-threading code. Results from the update are comparable to older 3.0 versions of the benchmark, which is important to ensure the new tests can be published to the existing database. It's also great because we can plug-and-play the new benchmark for some direct comparisons, while also providing updated performance results.

(Image credit: Tom's Hardware)

The SPECworkstation 3 update is available as either a new complete download or as a patch, and is available today.

After debugging why we couldn't extract the utmost performance of the 3990X in our first round of SPECworkstation 3 tests, it's truly a wonderful sight to unleash the beast and finally see all 128 of those threads utilized in the subtests that can now leverage them. Let's see what that looks like on the following page.

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