31 replies to this topic

[+sanke1]

Don't know if this is a bug or a feature but the Windows 8 Task Manager always shows frequency higher than CPU-Z.

When I do CPU intensive task, it shows 5.10 Ghz frequency which is obviously wrong as my i5-3550 has maximum frequency limit of 4.10 Ghz.



Anyone noticed this? Clean re-install nor updating BIOS helped.

[ILikeTobacco]

sanke1, on 09 October 2012 - 14:10, said:

...

I am noticing the Maximum speed as being 4.1. Possible it throttles up and down to save energy?

[Astra.Xtreme]

Well your CPU will automatically underclock itself when it's not being used, so that part is probably correct.
But when it displays 5.1GHz, I have no idea what's going on there. Does CPU-Z show the same thing?

[+sanke1]

CPU-Z shows 4.1 Ghz. Windows task manager shows 4.8 Ghz or 5.1 Ghz depending on it's mood.

[xendrome]

This is normal if speedstep is on and you are using Balanced as your power plan AFAIK.

The CPU will clock down, then clock up to it's standard operating speed. That CPU operates at 3.30Ghz, and Turbos up to 3.7Ghz. Run prime95 on it and you should see it go up to 3.7Ghz.

I don't see where it says 5.1ghz but I don't know why it's showing 4.1Ghz unless you overclocked it

[Astra.Xtreme]

sanke1, on 09 October 2012 - 14:15, said:

CPU-Z shows 4.1 Ghz. Windows task manager shows 4.8 Ghz or 5.1 Ghz depending on it's mood.

I would definitely say it's a Windows problem then. But you shouldn't be surprised.

[firey]

sanke1, on 09 October 2012 - 14:10, said:

Don't know if this is a bug or a feature but the Windows 8 Task Manager always shows frequency higher than CPU-Z.

When I do CPU intensive task, it shows 5.10 Ghz frequency which is obviously wrong as my i5-3550 has maximum frequency limit of 4.10 Ghz.


Anyone noticed this? Clean re-install nor updating BIOS helped.

the newer intel cores have "Turbo Boost". Which will underclock your CPU automagically during low loads. During more CPU intensive tasks it will bring it up to speed. It's possible that when CPUz is launched it doesn't have much load and as such you see a lower speed, whereas I am assuming Windows 8 can take that into account and show the maximum, as well as the current.

[Hum]

This is a feature -- called EgoBoost

[+sanke1]

Hum, on 09 October 2012 - 14:19, said:

This is a feature -- called EgoBoost

Definitely no:

Look here. CPU under full load.

[HawkMan]

Right click the graph and change to logical processors, it might be it does something weird in how it calculates with multiple cores.

[ILikeTobacco]

sanke1, on 09 October 2012 - 14:27, said:

Definitely no:

Look here. CPU under full load.

Question... whats the multiplier for under what you pointed at

[+sanke1]

Multiplier is 39 or in rare cases it does hit 41.

Changing to logical processors does nothing.

[Deranged]

If you've got the system overclocked then yes, it's probably just showing the max speed under TurboBoost. When only one or two cores are active it'll boost the speeds. http://en.wikipedia....tel_Turbo_Boost

[+sanke1]

Deranged, on 09 October 2012 - 14:58, said:

If you've got the system overclocked then yes, it's probably just showing the max speed under TurboBoost. When only one or two cores are active it'll boost the speeds. http://en.wikipedia....tel_Turbo_Boost

i5-3550 is Non-K edition. It cannot be overclocked.

[Deranged]

Ahh. Well, it looks like Windows reports frequency based on only some variables. I'd dig around more but I haven't really slept in two days, time to fix that