CPU Demand Based Power Management

Morning All,

I hope someone can help me with this one. I have a Dell PowerEdge 2950 fitted with an Intel Xeon E5345 processor and when monitoring the clock speed using CPU-Z I can see that the Core Speed is fluctuating. I understand this can be one of a few Intel technologies, like halt states or Enhanced Intel Speedstep Technology. I am of the understanding that to turn these features on and off you need to use the BIOS but all I can see that is pertinant is Demand Based Power Management under the CPU information section of the BIOS which is alread set to disabled. I have also used RightMark CPU Clock Utility to see what powermanagement features are enabled and it shows enhananced halt states are in effect.

I did try to make use of Intels BIOS Implementation Test Suite bootable usb application to try and overide any settings being set by the BIOS however I cannot get it to correctly identify the processor, this happens on any Intel Processor I have tested it on so far.

The server in question is used as a Database server and sees large but short spikes in activity and it has been noted there is a small delay for the processor to kick in at full speed. I want to remove this latancy and the only thing I can think it could be is some sort of power management feature. The server is running version 2.5.0 of the dell's BIOS and Server 2003 R2.

Any suggestions are appreciated.

Regards,

Alastair