Intel Roadmap Leaks: 9th Gen Sept, New, 28 core A-Series

[Stefan Payne]

2 minutes ago, porina said:

AMD intentionally didn't put in as much FPU when designing Zen.

That is only true when talking about 256bit AVX code, with "normal FPU" Code the difference isn't that much.

 

But most of the power consumption measurements are bullshit because of the power saving mechanism things...

 

So you have to record the Power Consumption over time and compare it with the work done anyway. There is no other way these days, wich makes it just more complicated....

[MrShinny]

Wait. I'm confused...

 

Where's the leak in the roadmap?

[porina]

1 minute ago, Stefan Payne said:

That is only true when talking about 256bit AVX code, with "normal FPU" Code the difference isn't that much.

I've seen similar differences in x87 code too. 

 

1 minute ago, Stefan Payne said:

But most of the power consumption measurements are bullshit because of the power saving mechanism things...

I'm more interested in heavy loads, ones that are pretty continuous, so you could avoid it that way.

 

1 minute ago, Stefan Payne said:

So you have to record the Power Consumption over time and compare it with the work done anyway. There is no other way these days, wich makes it just more complicated....

I never said it would be easy, which is in part why it isn't so likely for people to do this type of testing. I know some places monitor the power delivered to the CPU connector on mobo, which is a start. If I were to do it, I'd be limited to self reported power usage, and I have no idea how accurate either AMD or Intel are in that area.

[awesomegamer919]

28 minutes ago, porina said:

I never said it would be easy, which is in part why it isn't so likely for people to do this type of testing. I know some places monitor the power delivered to the CPU connector on mobo, which is a start. If I were to do it, I'd be limited to self reported power usage, and I have no idea how accurate either AMD or Intel are in that area.

This is still not perfect as it is affected by VRM efficiency, technically the best way to get raw CPU power usage is to monitor voltage and current going to the CPU over x period of time, but that's not always possible.

[cj09beira]

3 hours ago, awesomegamer919 said:

This is still not perfect as it is affected by VRM efficiency, technically the best way to get raw CPU power usage is to monitor voltage and current going to the CPU over x period of time, but that's not always possible.

its not possible because although voltages are easy to get currents is much harder, it could be possible to do by the mobo manufacturers by adding a loop around the power plane though even that might not be doable due to how crowded that area of the board is 

the best way is to figure out the vrm efficiency by looking at the vrm datasheets and then reducing that from the power going into the the motherboard (much easier to measure)