CPU clock question

[mereTz]

Hi,

I got a Intel P8400 on my Lenovo T400 it should be clocked at 2.26Ghz, but even on maximum performance mode, i cannot raise the cpu clock over 1500 Mhz as shown in the attachement. 

Is there a problem with my laptop? or are there any settings that i'm missing?

[ColonelONeill]

Do you have the battery attached?

[tripplec]

Looks like the multiplier is wrong. Might be it's trottled down for some reason such as running HOT if its plugged in.

[richk]

Is your motherboard Intel or discrete graphics? Is your ac adapter 65w or 90w?

[nibs Guru]

Are you doing anything to stress the CPU while you are watching it in CPU-Z?

What temps is it running at?

[mereTz]

ColonelONeill no, i had no battery attached

[mereTz]

@nibs no. I had the laptop put on maximum performance while plugged in ( doesn't the cpu stay at the maximum speed in this setting? ), without battery ( it was 100% charged so i pulled it out ) .Under stress it doesn't reach 50 celsius, idle 35 celsius

[mereTz]

@richk mb is intel, and ac adapter 65w

[JDay · Accepted solution]

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mereTz wrote:

ColonelONeill no, i had no battery attached

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Put it in.

[mereTz]

why does the battery has something to do with the CPU clock?) i just took the battery out to protect it from overcharging...( or this isn't necessary? ). It works now. Thx