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Windows 7: CPU-Z ghz confusion

04 Oct 2013   #1

Microsoft Windows 7 Ultimate 64-bit 7601 Multiprocessor Free Service Pack 1
 
 
CPU-Z ghz confusion

I recently looked at my cpu speed through CPU-z and it said that the core speed was around 1648-1647 im beyond confusion i have an i5 @ 3.10. Am i reading cpuz wrong?

My System SpecsSystem Spec
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04 Oct 2013   #2

Windows 7 Home Premium 32 bit
 
 

You are reading the speed correctly.
Many modern CPUs have the ability to run at less than rated speed, which they will do when the demand for CPU resources are modest. This keeps power consumption and heat down, something which is of particular importance with laptops. Why run the CPU at full speed when it has little to do, which is typically most of the time? But when more is required from the CPU the speed will rise to maximum.
My System SpecsSystem Spec
05 Oct 2013   #3

Windows 7 Ultimate x64 SP1
 
 

launch some CPU intensive application and open CPU-Z.
you'll see a max speed then.
My System SpecsSystem Spec
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05 Oct 2013   #4

Microsoft Windows 7 Ultimate 64-bit 7601 Multiprocessor Free Service Pack 1
 
 

Thanks. So i was looking around a bit more and saw that my cpu has a boost clock to 3.40 but do i need the intel turbo boost tech in order to achive 3.4?. Max it reached was 3.29 while running crysis 3
My System SpecsSystem Spec
06 Oct 2013   #5

Windows 7 Ultimate x64 SP1
 
 

Quote   Quote: Originally Posted by ToxicXGL View Post
Thanks. So i was looking around a bit more and saw that my cpu has a boost clock to 3.40 but do i need the intel turbo boost tech in order to achive 3.4?. Max it reached was 3.29 while running crysis 3
your CPU factory freq is 3.1 so if it reaches 3.29 i suspect it already uses turbo boost.
why not 3.4? maybe it didn't need more than 3.29 on crysis3?
you may try Intel Burn Test to stress your CPU and see how high it goes.
My System SpecsSystem Spec
06 Oct 2013   #6

Windows 7 x64 (SP1)
 
 

Turbo Boost is also effected by the number of cores in use, if only one core is used it is more likely to get to the 3.4 GHz but the turbo boost is reduced the more cores in use. Crysis 3 uses multiple CPU cores.
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