Question Anandtech.com article on 13900k and 7950x power scaling

[adamge]

A Lighter Touch: Exploring CPU Power Scaling On Core i9-13900K and Ryzen 9 7950X

www.anandtech.com

It's an interesting article, but IMO severely crippled by the reliance on "configured" power limit rather than measuring power usage. It's even more frustrating when one of the datapoints is measured power usage, so the author has access to this data.

In this scenario where configured power limits are basically hand waving guidelines, measured power usage (specifically, average power usage by the CPU during the benchmark run) is the only useful, meaningful, and concrete way to analyze the performance results relative to the power usage.

 

[Mopetar]

Weird that a new poster shows up out of seemingly nowhere and has time to dredge through old threads and posts to be familiar with things that people have supposedly said months ago, but almost a week later can't be bothered to actually link to any of these posts.

 

[DrMrLordX]

Weird that a new poster shows up out of seemingly nowhere and has time to dredge through old threads and posts to be familiar with things that people have supposedly said months ago, but almost a week later can't be bothered to actually link to any of these posts.

What? That's totally normal and not at all indicative of some kind of viral marketing strategy.

 

[Mopetar]

What? That's totally normal and not at all indicative of some kind of viral marketing strategy.

I don't know if I'd go that far. I don't know if the quality of the work is worthy of pay and I don't think Intel would keep a position like this around while cutting technical staff.

I suppose there's always the horrifying possibility that this is being done for free, but I'd at least like to think that even if the reward isn't monetary it's being done for dopamine deposits.

And on along that line of reasoning, I'm still split between whether to tell them to go back into the drawer or back underneath the bridge. Perhaps a drawer tucked away under a bridge.

 

[DrMrLordX]

I don't know if I'd go that far. I don't know if the quality of the work is worthy of pay and I don't think Intel would keep a position like this around while cutting technical staff.

I suppose there's always the horrifying possibility that this is being done for free, but I'd at least like to think that even if the reward isn't monetary it's being done for dopamine deposits.

Considering the quality of work, my guess is that Intel went with a discount option to save money.

 

[igor_kavinski]

Considering the quality of work, my guess is that Intel went with a discount option to save money.

Maybe they got someone on Fiverr

 

[cortexa99]

A guy tested SPECint 2017 and draw efficiency curve:

https://twitter.com/x/status/1611956507628949508

Looks like the curve is worse than any other tests, especially for Raptor which stop scaling when PL > 150 watts

 

[Kocicak]

A guy tested SPECint 2017 and draw efficiency curve:

View attachment 76049

https://twitter.com/x/status/1611956507628949508

Looks like the curve is worse than any other tests, especially for Raptor which stop scaling when PL > 150 watts

This does not make any sense, perhaps the CPU was thermal throttling?

This is my own data:

Going from 130 to 210W, I got 15% more performance, they got just 7% more.

 

[Mopetar]

This does not make any sense, perhaps the CPU was thermal throttling?

This is my own data:View attachment 76054

Going from 130 to 210W, I got 15% more performance, they got just 7% more.

I wouldn't expect the scaling to be identical for every test. Unless they also posted CB23 numbers and I need to click through the tweet to see that graph.