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• #2762 S_x96x_S addikt

  Új Válasz 2020-02-27 15:57:51 #2762

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  S_x96x_S

  addikt

  ( leegyszerűsített (~legyengített) ZEN1 )
  Testing a Chinese x86 CPU: A Deep Dive into Zen-based Hygon Dhyana Processors
  https://www.anandtech.com/print/15493/hygon-dhyana-reviewed-chinese-x86-cpus-amd

  "We discovered that these processors have been changed from the Zen 1 design in a number of ways. To say they are carbon copies of the Zen 1 SoCs, which is what a lot of people have suspected, is not true – enough has changed in the design to say that these parts are rebalanced, mostly for worse performance than their Zen 1 counterparts. The integer performance is essentially identical, however the floating point performance has been reduced – common instructions having half the throughput, and random number generation has been adjusted to be both slow and produce lower quality random numbers. The cryptography engines have also been replaced, such that common AES instructions are no longer accelerated but others more specific to the Chinese security, such as SM2, SM3, and SM4, are now included. In our testing, despite the processors showing AVX/AVX2 support when probed, it appeared to be disabled. We suspect this to be more of a firmware bug than a limitation of the Hygon CPU."

  

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