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Which Intel processors have AVX2 disabled?
by mcbain 10y ago
Which Intel processors have AVX2 disabled?
- dogma1138 10y agoCore based Pentium/Celeron and some of the ULV CPUs have had AVX disabled since Ivy Bridge.
- mcbain 10y agoA little overstated to say that's half their SKUs, but I see your point.
- nickpeterson 10y agoThere is even more nuanced though, because Intel runs avx instructions at a different clockspeed than the main chip. So certain SKUs have avx support but have differences that don't reflect the CPU clock difference.
- dogma1138 10y agoThere is even more nuance to this as AVX low level instruction support isn't going to be universal as different CPUs will support different instruction subsets of AVX-512 and Extended AVX https://en.wikipedia.org/wiki/AVX-512 https://en.wikipedia.org/wiki/AVX-512 There is also a mess in FMA support for both Intel and AMD cpus... https://en.wikipedia.org/wiki/FMA_instruction_set https://en.wikipedia.org/wiki/FMA_instruction_set This entire deal pretty much turned AVX into cancer outside of very specific circles, especially considering the wierd support for AVX and SSE in OpenCL.