[f001]

That doesn’t seem right. The tdp for the 1700 is 65w… no way an io die is consuming most of that. Here’s a comparison of a system with a ryzen 1700 idling vs intel contemporaries which don’t have a separate i/o die: https://www.bit-tech.net/reviews/tech/amd-ryzen-7-1700-revie...

Note that it’s only 7W greater at stock clocks.

[Rinzler89]

Yes it does.

You're looking at chips from 2017 when Intel had stinkers and under load, but what I said is true, the IO die has high idle power draw compared to modern monolithic designs, which gets hidden away under load.

Just Google if you don't believe me, plenty of older desktop Ryzen owners complain about higher idle power draw compared to Intel.

[f001]

The ryzen 1700 is also from 2017. Intel’s cpus still dominated at the time for anything single-threaded, they were just bad at multithreaded workloads. I’m not saying i/o die power consumption isn’t higher, it is for sure. And I agree, it doesn’t go down at idle because it can’t turn off or do power gating.

What I’m saying is that a computer with a cpu that is 65W TDP (from a time when amd’s TDP was close to being accurate as ~ max power consumption under load), the i/o die (which is part of that 65w TDP; which is for load) cannot possibly be the main reason his computer is idling at 80W. Especially when I linked an instance of a system also with a ryzen 1700 that was idling for 57W and with a similar configuration as an intel contemporary only being 7W greater at idle.

[Rinzler89]

The 65W tdp you keep bringing up is under load and data is from 2017 when I tell was still on 14nm, but we're talking about idle power draws here and Ryzen looses to Intel in most cases in most modern data in the <10nm era.

Here:

https://news.ycombinator.com/item?id=32809852

https://youtu.be/JHWxAdKK4Xg?si=OFx6puKRSc1TYSX8

[f001]

For both the 1700 and 5800X, the i/o die uses ~12W at idle, and 20W max at load (assuming he’a doing something that keeps the i/o die at max power consumption when everything else is idle).

This leaves us with 60W-68W unaccounted for at idle. Even in the worst case for i/o power usage that’s 75% unaccounted for.

I keep talking about TDP and load power because even in the case where the cpu isn’t using lower power states correctly for whatever reason, the i/o die cannot possibly be majority of the 80W power usage.

Source for power usage of i/o die:

1700 (same i/o die as 1300x/1500x): https://www.anandtech.com/show/11658/the-amd-ryzen-3-1300x-r...

5800x: https://www.anandtech.com/show/16214/amd-zen-3-ryzen-deep-di...

[Log_out_]

What i do not get is,why not add condensators and computation only on filled condensator and memory fetch completed?