View Single Post
Old 8th February 2023, 08:52   #83  |  Link
DTL
Registered User
 
Join Date: Jul 2018
Posts: 1,041
Quote:
Originally Posted by nevcairiel View Post
Rumors have it that Zen4 might have AVX512, which would be an odd situation as Intel has pulled it from consumer Alder Lake, if AMD brings it to consumer desktop.
But those rumors might as well be totally off, as typical consumers would only see a small benefit ... but of course AMD uses the same cores for the entire lineup, so who knows.
At the end of 2022 AMD start to support some good set of AVX512 instructions in Zen4 7xxx chips. But may be not at the full rate (512bits per dispatch) and only by 256bits parts (so instructions per cycle about half of expected). But it most probably support full sized 2 kBytes register file for AVX512 and even separated register files for integer and floats (so 2x2 kBytes per core). It also helps to performance if program manually designed to use such 'large for desktop CPU' register file or C compiler was configured to AVX512 architecture and can use additional register space.

May be in the next generation of chips AMD will support AVX512 instructions dispatch at 'full rate' and it can help to performance more.

Nowdays more desktop developers with AMD 7xxx chips can make and test AVX512 software without using Intel SDE that only fully support up to Visual Studio 2017 (old enough).
DTL is offline   Reply With Quote