AVX-512's Enormous Advantage For AMD EPYC 4005 Series Performance
👁 AMD EPYC 4585PX with AVX-512 enabled
There are many workloads these days that can benefit from AVX-512 support -- much more so than when Advanced Vector Extensions 512 was first introduced by Intel. OpenSSL, Nginx HTTPS performance, select video encoders like SVT-AV1, and more can benefit significantly from AVX-512 as shown from today's results and the countless AVX-512 benchmark comparisons shown in the past on Phoronix. In 2025 and the popularity of AI, AI, and more AI, there is enormous potential for CPU-based inferencing on AVX-512 capable CPUs. Llama.cpp (and in turn LLamafile / LocalScore, etc), PyTorch, Intel oneDNN based software packages, OpenVINO, Microsoft ONNX, and more all showed terrific uplift from AVX-512 with the AMD EPYC 4005 series. With such a great showing and far better performance and efficiency than what is found with the Xeon 6300 series for AI, this opens up the AMD EPYC 4005 series for interesting possibilities for AI inferencing at the edge and other lower-power scenarios.
The AMD EPYC 4005 series also delivered fantastic uplift from AVX-512 for HPC workloads. For most high performance computing workloads you are better off going for the flagship EPYC 9005 series, but for those on a budget or that may be looking at these lower-cost EPYC CPUs for CI/CD-type smoke testing, unit testing, and other non-immediate validation purposes, the EPYC Grado CPUs delivered great performance in HPC apps like NAMD.
And then there were the variety of other creator workloads where the AMD EPYC 4005 series was performing great and clear gains from AVX-512 support. Many of Intel's own oneAPI software packages benefit significantly from AVX-512 and thus left in a situation where the AMD EPYC 4005 series is the much better buy for performance and power efficiency than their own Xeon E or Xeon 6300 series CPUs.
Out of more than 80 benchmarks run in total that are able to make use of AVX-512, the benefits of AVX-512 with a full 512-bit data path on these EPYC 4005 series processors were very clear.
Even without AVX-512 enabled, the EPYC 4345P at the same core/thread count as the Xeon 6369P was at 1.32x the performance of that Intel Raptor Lake era server processor re-hashed from the Xeon E-2400 series. In the default configuration with AVX-512, the EPYC 4345P was at 2.13x the performance of the Xeon 6369P for this wide swath of AVX-512 capable workloads. Or the EPYC 4585PX at the top-end of the EPYC 4500 series was at 3.34x the performance of the Xeon 6369P Intel flagship with this assortment of AVX-512 capable workloads. Absolute domination with the EPYC 4005 series for this class of workloads.
Unlike the early days of Intel CPUs with AVX-512 that gave Advanced Vector Extensions a bad introduction due to high power use and poor thermals, that hasn't been the case with AMD's Zen 4 and Zen 5 implementations. When looking at the CPU power numbers across all of the benchmarks conducted, there was no real difference for either the EPYC 4345P or EPYC 4585PX in the CPU power draw with/without AVX-512. AMD's AVX-512 implementation has continued to be remarkably efficient from Ryzen and bigger EPYC CPUs to now with the EPYC 4005 series confirmation too.
On average with these AVX-512 capable workloads the EPYC 4345P power consumption was at 85% that of the Xeon 6369P average (or the CPU peak power use at 41% that of the Intel Raptor Lake derived CPU...) all while delivering 2.13x the performance at the same core/thread count. As compelling as the performance and power efficiency numbers are alone, the T.K.O. of the Xeon 6300 series failing to compete with the EPYC 4005 processors is on price. The EPYC 4345P has a list price of $329 USD (at NewEgg as of writing can be found in-stock at $319) compared to the Xeon 6369P at while the Xeon 6369P has a $606 list price (the only in-stock listing I found as of writing was at CDW for $674 USD). Or the AMD EPYC 4585PX flagship at $699 USD. Especially for AVX-512 workloads but extending to a far majority of other workloads as well (as shown in the other articles such as the other EPYC 4005 benchmarks / articles), the AMD EPYC 4005 series obliterates the competition across performance, power efficiency, and value.
If you enjoyed this article consider joining Phoronix Premium to view this site ad-free, multi-page articles on a single page, and other benefits. PayPal or Stripe tips are also graciously accepted. Thanks for your support.