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Core I 5

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January 8, 2011 1:14:13 AM

Hallo, at System start up , My Core I 5, 2.8Ghz , Overclocks itself, to 3.5 Ghz, Multiplier is set to 25 ????, then after a Minute , it drops to 1.2 Ghz, Multiplier drops to 9, When I enable XMP on The MSI P55-GD65 Motherboard, from 133 MHz, to 160 MHz, the CPU goes up to 4.0, MHz ?????

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January 8, 2011 1:38:29 AM

Turn off your power saving settings in the bios and see if it remains stable. The 3.5 is probably the turbo mode and then it drops out to save power. Will it remain at 3.5 during a stress test?
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January 8, 2011 2:37:27 AM

arragon said:
Hallo, at System start up , My Core I 5, 2.8Ghz , Overclocks itself, to 3.5 Ghz, Multiplier is set to 25 ????, then after a Minute , it drops to 1.2 Ghz, Multiplier drops to 9

The first part is called turbo. It is a feature of the processor to improve performance.

The second is speedstep, designed to reduce power consumption when there is little or no demand on the CPU.

Neither is a concern and both are an advantage to have.

arragon said:
When I enable XMP on The MSI P55-GD65 Motherboard, from 133 MHz, to 160 MHz, the CPU goes up to 4.0, MHz ?????

Don't mess with bios settings if you don't know what you are doing.
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January 8, 2011 2:40:33 AM

I haven't done a stress test, but when I Play games the CPU goes up to 2.5 Ghz, and the Graphics card goes up too, this is my first built PC, Colermaster 932 Case, MSI P55-GD65 Motherboard, G.Skill 8gb 1600 MHz, G. Skill 120 GB SSD, MSI 460 GTX Hawk Graphics Card, Kingwin 1000 Watt power supply, Windows 7, 64 bit OEM, Corsair H50
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January 8, 2011 3:01:27 AM

Thanks for the help, Msi Manual don't explain much of the Bios so I'm still learning, setting, memory, from 133mhz to 160Mhz, was easy, but CPU goes up to 4.0 Ghz, at System start up, temperature, was at 66, never went up , LED Power Phase, at full load, enabling XMP profile
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January 8, 2011 4:35:21 AM

sounds like you are trying to overclock. You didnt mention this in your first post. It is advised when overclocking to disable speedstep but especially to disable turbo.
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January 8, 2011 4:37:45 PM

I'm not trying to overclock, I just wanted , the 160Mhz, from the Memory, but enabling XMP Profile, was a Overclock, I guess, as stated, in MSI Manual
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January 8, 2011 5:16:39 PM

If you enable the XMP feature in MoBo BIOS, it generally does two things:

1. BCLK changes from 133 to 160
2. Memory Multiplier goes from 8 to 10

If you don't have an aftermarket cooler, this would be a bad thing.

The processors have speed step and turbo mode ..... these are auto enabled when needed ... running OCCT for example will put your CPU under load and therefore speed step and turbo will have the CPU at its full potential.
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January 10, 2011 4:53:53 PM

Best answer selected by arragon.
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