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Windows 7: Win 7 Pro decresed my CPU Clock speed by 600mhz!

09 Apr 2010   #1

Windows 7 Professional - Retail
 
 
Win 7 Pro decresed my CPU Clock speed by 600mhz!

I ordered Windows 7 Pro 2 weeks ago and I have been loving it since I installed it. I'm really digging the level of customizing that you can do, and this site is a godsend. Thank you all for your efforts and tutorials! However, I just noticed today that my Core2Quad Q9450 is now running at 2.0Ghz instead of 2.66Ghz Also the the memory has been clocked down 33% according to BlackBox 2.0.
Can anyone tell me why this is? I was going to start overclocking soon, but if this is a problem I would like to have it fixed first. I haven't touched the BOIS. I did not have this machine overclocked with XP either, I had it running at stock speeds. All I did was a clean install with a format of my system drive.
I haven't checked the BIOS yet, I'm going to later, I have to leave the computer on for the next 20-30 mins. I just thought I'd check to see if this has happened to anyone else.
Thanks in advance for any feedback.




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Win 7 Pro decresed my CPU Clock speed by 600mhz!-2010-04-09_162550.jpg  
My System SpecsSystem Spec
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09 Apr 2010   #2
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

I fail to see how an operating system (or any program) can change the clock speed of a processor. What is odd though is that Windows 7 reports the right clock speed and the other 2 programs do not. Absolutely mysterious.
My System SpecsSystem Spec
09 Apr 2010   #3
Microsoft MVP

Win 7 Ultimate x64
 
 

AC73, welcome to the forums.

Any chance you have Speedsstep or any other power saving modes enabled in the bios? If so then between that and Windows 7 own power settings (default is Balanced), that would explain it. Clock speeds are lowered as well as voltages in most cases when the computer isn't under load, and ramps back up to full speed when needed.
My System SpecsSystem Spec
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09 Apr 2010   #4

Windows 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by stormy13 View Post
Clock speeds are lowered as well as voltages in most cases when the computer isn't under load, and ramps back up to full speed when needed.
+1.
My System SpecsSystem Spec
09 Apr 2010   #5

Win 7 Professional 64bit
 
 

+2
I have Speedstep running on my i7-860 and see the same thing.
Not worried as I know it will ramp up as needed


Attached Images
 
My System SpecsSystem Spec
09 Apr 2010   #6

Windows 7 Professional - Retail
 
 

Quote   Quote: Originally Posted by stormy13 View Post
AC73, welcome to the forums.

Any chance you have Speedsstep or any other power saving modes enabled in the bios? If so then between that and Windows 7 own power settings (default is Balanced), that would explain it. Clock speeds are lowered as well as voltages in most cases when the computer isn't under load, and ramps back up to full speed when needed.

Well after a reboot, all is well it seems. I don't really understand why this happened. I was unaware that C2Q's had speedstep. I thought it was introduced in the Lynnfield CUP's? I have my system specs in my profile for all too see, I don't think my system is compatible with speedstep.
I'm not using any power saving modes in the BIOS or other wise. The only power saving option I have selected in Windows is to turn off the monitor after 30mins.

Thanks for the replies. I'll check periodically to see if this happens again. If so I'll let you all know.
Now its back to customizing Windows with the awesome tutorials here.
Thanks again.


Attached Thumbnails
Win 7 Pro decresed my CPU Clock speed by 600mhz!-2010-04-09_201118.jpg  
My System SpecsSystem Spec
09 Apr 2010   #7

Windows 8.1 Pro (x64)
 
 

All of Intel's Core line have Speedstep and other power saving features. (less power == less heat)
Windows 7 offers the ability to configure how much to step the processor in advance power settings.

You notice in the first screenshot CPU-Z reports the Multiplier as x6.0 while in the latest it is reported as x8.0. That was Speedstep's doing.
My System SpecsSystem Spec
09 Apr 2010   #8

Win 7 Home Premium-64bit
 
 

Quote   Quote: Originally Posted by logicearth View Post
All of Intel's Core line have Speedstep and other power saving features. (less power == less heat)
Windows 7 offers the ability to configure how much to step the processor in advance power settings.

You notice in the first screenshot CPU-Z reports the Multiplier as x6.0 while in the latest it is reported as x8.0. That was Speedstep's doing.
Does Intel i3 have Speedstep as well? And if so...how do I go about chcking this "Speedstep to see if it powered back my laptop as well? Thanks for your time!
My System SpecsSystem Spec
09 Apr 2010   #9

Windows 7 Professional - Retail
 
 

Quote   Quote: Originally Posted by logicearth View Post
All of Intel's Core line have Speedstep and other power saving features. (less power == less heat)
Windows 7 offers the ability to configure how much to step the processor in advance power settings.

You notice in the first screenshot CPU-Z reports the Multiplier as x6.0 while in the latest it is reported as x8.0. That was Speedstep's doing.
I noticed the mutiplier. I thought the multiplier was locked on my CPU. I just bought an OEM without a HSF, does this mean that speedstep and change the multiplier but I cannot in the BIOS?
I am going to OC, just not right now, I'm a bit busy for the next week or so. I don't have any games installed yet anyways.
My System SpecsSystem Spec
09 Apr 2010   #10

Windows 8.1 Pro (x64)
 
 

Quote   Quote: Originally Posted by canspec View Post
Does Intel i3 have Speedstep as well?
Yes. http://processorfinder.intel.com/det...px?sSpec=SLBMQ

Quote:
I thought the multiplier was locked on my CPU.
It is locked, except to Speedstep which is a function of the CPU itself.
My System SpecsSystem Spec
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 Win 7 Pro decresed my CPU Clock speed by 600mhz!




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