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1 Posts

06-22-2011

San Jose, CA

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Re: X220 cpu throttling problem

2011-06-22, 17:26 PM

I just found this thread.

 

I don't think this is i7 specific issue, rather depending on total amount of power system needs.

I have i5 x220, and think I'm also seeing the 'perm throttling', CPU stay at 800 MHz even with AC plug-in and power settings to 'high performance'. If I plug out the AC adapter, then it backs up to high frequency. 

 

I have 2 sticks of ram, and SSD in my system. 

Is this, cpu throttling on i5 machine, also a known issue?

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30 Posts

06-22-2011

Singapore

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Re: X220 cpu throttling problem

2011-06-22, 18:00 PM

Would be nice if Lenovo extends our warranty since we are effectively getting a half-baked product for such a long time now that it feels like we are not getting the X220 intended.

 

nah, dreaming on my part.:smileytongue:

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18 Posts

06-19-2011

Singapore

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Re: X220 cpu throttling problem

2011-06-22, 18:55 PM
of cos everyone here who owns the X220, hope it is not a hardware problem but a software problem by updating the driver or bios will solve the case.

If the x220 gets recall back, will be super troublesome. lets hope and pray is a software issue.
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63 Posts

06-20-2011

UK

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Re: X220 cpu throttling problem

2011-06-22, 19:20 PM

@peakzone

What the Lenovo personnel said when he referred to component supplier is not a good sign. If it would be an intel issue then we'd be fine and would have been addressed by now via a bios update. But that's not the case.

I am afraid that ... after reading all the heat related issues (around the fan) and the static touchpad etc. we have a defective motherboard design at hand or a bunch of motherboards that have some defective parts.

Right now the Lenovo engineers are trying to tweak this issue in the bios. The goal is to reduce to simptoms to a less visible level which will be recognized/detect by a smaller number of users because they want to avoid a recall. I hope I am wrong.

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84 Posts

10-15-2008

Edmonton, Alberta, Canada

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Re: X220 cpu throttling problem

2011-06-22, 19:25 PM

Ive said this about 20 times on various boards, but has anyone seen throttling in linux?

This will indicate very quickly whether it is software of hardware issue.

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55 Posts

05-13-2011

United Kingdom of Great Britain and Northern Ireland

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Re: X220 cpu throttling problem

2011-06-22, 20:36 PM

 


wrote:

Ive said this about 20 times on various boards, but has anyone seen throttling in linux?

This will indicate very quickly whether it is software of hardware issue.


But not if it's a BIOS or embedded controller issue, which I presume is most likely.

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84 Posts

10-15-2008

Edmonton, Alberta, Canada

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Re: X220 cpu throttling problem

2011-06-22, 21:21 PM

But showing that it happens in linux would prove this. To the best of my knowledge no one has proved this yet. There was an issue with throttling on Macbooks that seemed to only occur in windows and not OSX. Interested to see if it is a similar bug.

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32 Posts

06-03-2011

UK

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Re: X220 cpu throttling problem

2011-06-22, 21:58 PM

Had my i7 throttle today while playing Starcraft 2 on low settings. Shouldn't have brought the 65Watt with me...

X220 4286 CTO, i7-2620M, 8GB RAM (2x4), 320GB HDD+Intel mSATA 80 GB, IPS display, BT 3.0, Intel 6205 WiFi, Finger Print Reader, Win7 Pro 64
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6 Posts

06-22-2011

Atlanta

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Re: X220 cpu throttling problem

2011-06-22, 23:02 PM

I got my x200 with i7-2620M with a 65W adaptor recently and bumped into this thread today. Got a half curious and a half worried, so I downloaded OCCT and HWiNFO32, and ran the GPU stress test.

 

Before that I upgraded BIOS to 1.17 from 1.16 in a hope to solve a whining fan problem. (In fact, with the upgrade, the fan behaved reasonably. With 1.16, the fan was always above 3k RPM).

 

Then, I noticed that throughout the GPU stress test, the CPU clock stayed at 2.4GHz, and the GPU clock went up to 1.3GHz and stayed there. The CPU clock never reached to 3.2GHz, though.

 

Two questions :

 

1) Do I have to add more stress onto the CPU to reproduce the problem? It seems that a GPU test with the OCCT suffices to reproduce the problem for others.

 

2) BIOS 1.17 says it solves throttle problems. Is this behavior (CPU clock stayed at 2.4GHz) intended by Lenovo through the BIOS 1.17 to prevent this throttling issue?

 

Best

-BK

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17 Posts

05-13-2011

United States

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Re: X220 cpu throttling problem

2011-06-22, 23:04 PM
Yorke - make sure you are running on Maximum Performance profile with CPU speed set to Maximum Turbo. You can try running wPrime concurrently with OCCT (wPrime will stress CPU while OCCT stresses GPU). Several people saw the throttling much faster or exclusively with the combo.
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