Quantifying The AVX-512 Performance Impact With AMD Zen 5 - Ryzen 9 9950X Benchmarks

Written by Michael Larabel in Processors on 15 August 2024 at 09:00 AM EDT. Page 7 of 7. 40 Comments.
Geometric Mean Of All Test Results benchmark with settings of Result Composite, AMD Ryzen 9 7950X / Ryzen 9 9950X AVX-512 Comparison. Ryzen 9 9950X: AVX-512 On was the fastest.

When taking the geometric mean of the 90 benchmarks used for this AVX-512 on/off comparison, the Zen 5 AVX-512 implementation with the Ryzen 9 9950X saw its performance go up by 56% while the Ryzen 9 7950X Zen 4 with its "double pumped" AVX-512 implementation saw its performance go up by 41%. Zen 4's AVX-512 was great and now with Zen 5 it's even better with the SKUs having the full 512-bit data-path. This is especially good news for Ryzen 9000 series (EPYC 4005?), EPYC Turin, etc.

CPU Power Consumption Monitor benchmark with settings of Phoronix Test Suite System Monitoring.

Making the Zen 5 AVX-512 results all the more exciting is that even with the 512-bit data-path there is no significant difference in the CPU power consumption. Like with Zen 4 AVX-512, whether AVX-512 is on/off the results were typically within a few Watt difference. Ryzen 9 9950X itself also continues proving to be more power efficient than the Ryzen 9 7950X.

CPU Peak Freq (Highest CPU Core Frequency) Monitor benchmark with settings of Phoronix Test Suite System Monitoring.

Similarly, the CPU peak frequency was similar whether AVX-512 was on or off with the Ryzen 9 9950X -- another early frustration of Intel AVX-512 designs.

CPU Temperature Monitor benchmark with settings of Phoronix Test Suite System Monitoring.

And no negative thermal issues with engaging AVX-512 workloads on the Ryzen 9 9950X compared to disabling AVX-512. Here we also see the Ryzen 9 9950X operating cooler than the Ryzen 9 7950X regardless if AVX-512 was left enabled or not.

The Zen 5 AVX-512 implementation with a full 512-bit data path is proving to be very useful for a range of relevant workloads from renderers to AI and HPC workloads to even other innovative AVX-512 uses like speedy JSON parsing.

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Michael Larabel

Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via MichaelLarabel.com.