[th3typh00n]

> Can other SIMD instructions (AVX2, say) do the same?

On Intel CPUs, yes. There's even a BIOS/UEFI setting to specify how much you want the clock frequency to drop when running AVX code called "AVX offset". AMD CPUs doesn't do that though as far as I know.

The thermal hit of using wider vectors decreases with every node shrink though, so expect the issue to become muted over time (which also explains why that doesn't apply to AMD - their only µarch with 256-bit execution units, Zen 2, is on a better node than Intel).

[dogma1138]

AVX offset is only available on motherboards that support overclocking due to how much higher intel CPUs can be pushed relatively to their advertised base and boost clocks.

Both Zen and Intel lower their clocks under load especially AVX, keep in mind that Zen 2 doesn’t even reach its advertised boost clocks under any load some CPUs come close to within 100mhz or so but overall they all clock down rather fast once TMax or PMax is reached.