the avx2 versions are optimized for the amd fx series , right ?

[leao-nardo]

in all the builds ,right? win xp 7 , 10 11 . all the linux builds .
for those fx-6300 , fx-8350 , fx-9350

i remember reading that somewhere

[gz83]

Are you sure this is Thorium's description?

[primobrowser]

@leao-nardo @gz83 Bulldozer chips (AMD FX series) don't have AVX2, only AVX.

https://en.wikipedia.org/wiki/Excavator_(microarchitecture) was the first to have AVX2, but those were not popular at all so Ryzen 1st gen are the first AMD CPUs you are likely to come across with AVX2 support.

And the AVX2 builds are not tuned for any specific architecture.

Instead we manually add instruction set flags like:

-mavx -mavx2 -mfma