Incorrect CPU speed in Cpu-Z/Window

April 6, 2009 at 18:13:41
Specs: Windows Vista-64

I have an E6300 1.86 OC'd to 2.94. Everything reads correctly in the bios, all settings are correct. Now when I go into Windows Vista, the CPU speed reads 1.87 ghz under Vista and CPU-Z. Just yesterday everybody was telling the truth, now only the bios reads the correct speed. What the hell is going on?

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#1
April 6, 2009 at 18:37:48

It's possible that your processor is "throttling"either for power management reasons or because it is over heating.

If you run a program like CPU burn, which would fully utilize the processor, you would see the reported speed pop back up to 2.94 if it is a energy saving thing.

Check your temperatures to make sure it hasn't reached any maximums set in the BIOS or any physical limits determined by the processor.

-Ryan Adams
Free Computer Tips and more:http://RyanTAdams.com

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#2
April 6, 2009 at 19:00:49

Do you still have SpeedStep enabled?

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#3
April 6, 2009 at 21:05:11

Sometimes cpu-z doesn;t report the overclock. I have an E6550 overclocked to 2.80 GhZ, but cpu-z also reports it at 2.4 GhZ. However, a utility such as Everest Home Edition or SIW does show 2.80 GhZ.

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#4
April 7, 2009 at 10:09:21

This is unreal. I dl SIW and it still reports a stock clocked 1.86! I reset my BIOS to a 420 bus, 2.94 cpu, proper voltage settings, no speedstep setting are available, no power or safety settings are in effect. Even when I go through a windows based app to OC such as EasyTuner6, the settings do not take!! What's left? It's like my rig has developed AI and does what it wants not what I want it to do!

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#5
April 7, 2009 at 10:44:24

Problem solved. I removed my rig, opened er up, made sure all fans are operating, cleared the CMOS, hooked her back up, fired it up, and it clocked in at 2.94 under SIW. My theory: perhaps a thermal event made the rig clock to default (maybe even somekind of damage done) then wouldn't clock back up until a hard clearance.Any thoughts?

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#6
April 7, 2009 at 10:59:27

"no speedstep setting are available"

In your BIOS it's called "CPU EIST Function". Try these settings to run the CPU at 2.80GHz:

CPU EIST Function = disabled
CPU Host Clock Control = enabled
CPU Host Frequency (Mhz) = 400
PCI Express Frequency (Mhz) = 100
C.I.A.2 = disabled
System Memory Multiplier = 2.00 (assuming you have DDR2-800)


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