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Does anyone in here know if Zen2 is going to implement AVX properly? Threadripper2 will not, all AVX2 instructions will operate at ~SSE speeds, as on past AMD c
by gameswithgo 8y ago
Does anyone in here know if Zen2 is going to implement AVX properly?
Threadripper2 will not, all AVX2 instructions will operate at ~SSE speeds, as on past AMD chips.
- ksec 8y agowhere did you get this idea from?
- floatboth 8y agoZen 1 already implements AVX2 properly. It doesn't have 256 bit wide units, so it's 2 clock cycles instead of 1… but that's actually good. Intel's 256 bit units cause horrible downclocking issues: https://blog.cloudflare.com/on-the-dangers-of-intels-frequency-scaling/ https://blog.cloudflare.com/on-the-dangers-of-intels-frequen... What even is "SSE speeds"?!
- fgonzag 8y agoAt least AMD has consistent AVX performance over prolonged periods of time. Intel starts throttling and downclocking so hard because of heat output that if you are doing any type of mixed workload, its better to skip the AVX instructions since the rest of the workload will suffer due to the extreme performance degradation.