MP 1,1-5,1 Intel turbo boost - conservative?

[Darmok N Jalad]

So I'm watching my W3690 in my 4,1 -> 5,1 under Windows 10, and I notice that whatever hardware monitor I use, the CPU only boosts to 3.6GHz. Intel rates the maximum boost to be 3.73GHz, but so far I have not seen it. There doesn't seem to be any trouble running 3.6 all core, but that seems to be the cap. Windows Task manager may randomly show it at 3.7, but it seems quite unreliable and not accurate compared to other, more advanced monitors.

I guess the cMP is probably engineered this way for better stability or something, or does anyone else see a different result? More curious than concerned.

 

[fendersrule]

See some of my posts on this.

It’s a bit unsolved. The best guess is that since the 3.46 was never supported then it will only boost accordingly.

Others think it’s a view error.

 

[h9826790]

I also notice that Windows 10 Task Manager always shows 3.6GHz for my W3690. I am quite sure that's normal (most likely same as X5690)

For 3.46 Turbo 3.73CPU, the boost table like this.

Which means the CPU will stay at 3.6GHz [ (26+1) x 133MHz = 3.591MHz ] when all 6 cores are in use. I believe Windows 10 simply capture this "normal clock speed" and show that in Task Manager.

Only when 1-2 cores are active, then the CPU clock speed can bump up to 3.73GHz [ (26+2) x 133MHz = 3.724GHz ].

In fact, Linkpack (in macOS) can capture the momentary CPU clock speed when starting the test. I just test it again, and can shows 3.722GHz.

And if I run it a few times, it may shows 3.723GHz.

Or 3.587GHz etc

So, it can read the CPU speed in real time apparently, even tiny difference can be spotted. Also, 3.73GHz is available, and can be used on cMP.

I believe it's the same in Windows, but you may need another way to observe this clock speed boost.

 

[Darmok N Jalad]

I also notice that Windows 10 Task Manager always shows 3.6GHz for my W3690. I am quite sure that's normal (most likely same as X5690)

For 3.46 Turbo 3.73CPU, the boost table like this.
View attachment 853192

Which means the CPU will stay at 3.6GHz [ (26+1) x 133MHz = 3.591MHz ] when all 6 cores are in use. I believe Windows 10 simply capture this "normal clock speed" and show that in Task Manager.

Only when 1-2 cores are active, then the CPU clock speed can bump up to 3.73GHz [ (26+2) x 133MHz = 3.724GHz ].

In fact, Linkpack (in macOS) can capture the momentary CPU clock speed when starting the test. I just test it again, and can shows 3.722GHz.
View attachment 853189

And if I run it a few times, it may shows 3.723GHz.
View attachment 853190

Or 3.587GHz etc
View attachment 853191
So, it can read the CPU speed in real time apparently, even tiny difference can be spotted. Also, 3.73GHz is available, and can be used on cMP.

I believe it's the same in Windows, but you may need another way to observe this clock speed boost.

I was wondering if there was even a program that could tell us clock speeds on the older Intel CPUs. Intel has the power gadget, but it only works on 2nd gen core and up.