News for hackers. Stuff that matters.

A comment on AMD Threadripper 3970X under heavy AVX2 load: Defective by design?. Parent comment

Re:AMD Threadripper 3970X under heavy AVX2 load: Defective b... by wyldfire on Friday February 21, 2020 @10:26AM (#22383760)
> fortunately fixable if you disable all spread-spectrum

If these are on by default, are they required for FCC certification conformance? Presumably the device has not been EMI/EMC tested in the mode where spread-spectrum was disabled.

[ Parent | on HN ]
Re:AMD Threadripper 3970X under heavy AVX2 load: Defective b... by Filligree on Friday February 21, 2020 @10:35AM (#22383823)
They are, but I'm not physically in the USA. At any rate, isn't a computer case basically a Faraday cage?

The frequencies are up in the microwave band, so I can't imagine there's much range.

[ Parent | on HN ]
Re:AMD Threadripper 3970X under heavy AVX2 load: Defective b... by wyldfire on Friday February 21, 2020 @10:42AM (#22383882)
> computer case basically a Faraday cage?

If it was designed well ;)

But that's only effective for addressing radiated emissions, not conducted ones.

[ Parent | on HN ]