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Old 25th September 2019, 17:20   #16  |  Link
MeteorRain
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Join Date: Dec 2003
Location: NJ; OR; Shanghai
Posts: 894
Quote:
Originally Posted by RanmaCanada View Post
AVX512 is useless. The amount of heat that is generated when it's enabled actually slows down your encodes. Also the sheer amount of power used during it makes it far less efficient.
I'd say they are all implementation related.

When AVXx was first introduced, it was even slower than SSEx sometimes. How about now? We all enjoy AVX2 bringing 20-30+% performance boost. AVX512 right now is not even widely supported, and there's only Intel implementation.

It's also widely known that Intel down clock when executing lots of AVX2 code. When AMD finally have a proper AVX2 implementation, we observe that it does not down clock. So we can still hope in a day when we can have full speed AVX512 and it'll eventually outperform AVX2.
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