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The Exiled · 25.06.2025., 19:39

Citiraj:

Intel Xeon 6300 vs. AMD EPYC 4005 SMT/HT performance

Citiraj:

While the latest Intel Core Ultra processors have done away with Hyper Threading (HT), Intel Xeon CPUs continue supporting HT/SMT, including with their latest Xeon 6300 series budget server processors. As the new AMD EPYC 4005 "Grado" processors also support Simultaneous Multi-Threading (SMT) and can be found at the same core/thread count count as the flagship Xeon 6369P processor, it makes for an interesting look at comparing the SMT/HT performance impact and power efficiency. For making this SMT/HT comparison as 1:1 as possible, the AMD EPYC 4345P was used that is an 8-core / 16 thread CPU like the Xeon 6369P.

At the same core counts, the Zen 5 based AMD EPYC 4005 series was showing greater benefit out of SMT than the flagship Xeon 6300 series processor. Also fascinating to see was that the AMD EPYC 4345P even with SMT disabled was still faster than the Xeon 6369P with its full load-out thanks to the EPYC Grado CPU supporting AVX-512 and other advantages over the Xeon 6300 series that in turn is largely rehashed from the Xeon E-2400 series. Across all 69 benchmarks in total, there wasn't any significant CPU power consumption difference for either the EPYC 4345P or Xeon 6369P. The EPYC 4345P was not only delivering better performance over the Xeon 6369P but it was doing so at lower power: 82 Watts on average compared to the Xeon 6369P at a 93 Watt average and a peak power consumption rate more than double.

Izvor: Phoronix

Citiraj:

AVX-512's enormous advantage on AMD EPYC 4005 series performance

Citiraj:

With the AMD EPYC 4005 series there is up to 16 cores / 32 threads unlike the Xeon 6300 series with its 8 core / 16 thread max, DDR5-5600 ECC memory support compared to DDR5-4800, the "PX" SKUs for 3D V-Cache, and then AVX-512 being one of the significant architectural advantages with these lower-cost Zen 5 server processors. AVX-512 with the EPYC 4005 series can be of enormous benefit to Advanced Vector Extensions 512 capable workloads, as shown in tests as well with the EPYC 9004/9005 series and AMD Ryzen 7000/8000/9000 series too. Even without AVX-512 being enabled, the EPYC 4345P 8-core processor was still surpassing the Xeon 6369P competition while in its standard load-out configuration easily whoops that Xeon E-2400 series successor while the EPYC 4585PX performance is in a whole separate ballpark.

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. 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. 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.

Izvor: Phoronix