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A comment on Hot Chips 2023: AMD’s Phoenix SoC. Parent comment

Re:Hot Chips 2023: AMD’s Phoenix SoC by ilyt on Sunday September 17, 2023 @08:11AM (#37544199)
> In the 90's harddrives often had a 7200 Hz whine which was enourmously annoying.

The what now ? nothing in hard drive runs at that frequency

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Re:Hot Chips 2023: AMD’s Phoenix SoC by da768 on Sunday September 17, 2023 @08:19AM (#37544263)
More like 7200 RPM, but that would be 120Hz. The motor would be driven by PWM though, that's more likely to cause sound issues
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Re:Hot Chips 2023: AMD’s Phoenix SoC by tyingq on Sunday September 17, 2023 @09:10AM (#37544691)
A deep dive into that topic...PWM drivers for hard drives, torque ripple, and reducing noise. https://www.ti.com/sc/docs/msp/papers/1998/bwhite.pdf
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