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A comment on Arm Announces Armv9 Architecture: SVE2, Security, and the Next Decade. Parent comment

Re:Arm Announces Armv9 Architecture: SVE2, Security, and the... by AshamedCaptain on Tuesday March 30, 2021 @04:22PM (#26639929)
Actually, that would only be right if the Raspberry Pi was any good regarding power usage. However the Raspberry Pi is utterly crap at power savings, with practically no power saving modes and very power-hungry (though cheap) components. (excluding the RPI0 models, which have no peripherals whatsoever).

I have a _very old_ PN40 from Asus -- this is a full PC with an intel Celeron, a SATA SSD and about 8GB of RAM that idles at 1.7W (serving websites via GB Ethernet) as measured _at the wall_. This is just standard PC Linux distro with zero customization (other than `powertop --auto-tune`).

For comparison, the latest RPI4B without the SSD and with 1/8 RAM idles at 3.5ishW on the wall. Even the older RPI3 I could never get below 2W, and that is without any peripherals (no display, no Wifi, no eth, min USB) and significant tuning.

On the other hand the PN40 + components cost significantly more (probably close to 10x), and the CPU performance itself is not that good these days.

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Re:Arm Announces Armv9 Architecture: SVE2, Security, and the... by gtirloni on Tuesday March 30, 2021 @08:27PM (#26642189)
That's weird. Most places report rpi's idling below 1W

https://raspi.tv/2019/how-much-power-does-the-pi4b-use-power...

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Re:Arm Announces Armv9 Architecture: SVE2, Security, and the... by davrosthedalek on Tuesday March 30, 2021 @09:17PM (#26642498)
That website lists Pi4B at 575mA. At 5V, that's 2.875W. With efficiency of a typical usb power supply, ~80%, that's about 3.5W at the wall.
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Re:Arm Announces Armv9 Architecture: SVE2, Security, and the... by gtirloni on Wednesday March 31, 2021 @10:19AM (#26647646)
Ah, got it. I misread the data, thank you.
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