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46 Posts

05-21-2011

UK

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Re: X220 cpu throttling problem

2011-05-23, 20:20 PM

erik - vinuneuro and I are having slightly different presentations of a similar issue. On my system:

 

a) The throttling down to 800mhz happens regardless of whether or not I have either, or both, of CPU Power Management and/or Intel StepSpeed options enabled OR disabled in the bios. It appears, on my system, to be unrelated to those bios options. I have tested with all four combinations (both on, both off and either on/off).

 

b) The throttling is semi-permanent, it does not throttle back-up once the laptop cools - I can leave it 1 second or 12 hours, but unless I turn it completely off and do a cold boot, it will stay throttled to 800mhz. Even a warm reboot does not rectify the throttling.

 

c) I do not think it's cpu-thermal related. I say this because I have tested the CPU using wprime and prime95 for over an hour, and despite the cpu reaching 95C, I cannot replicate the semi-permanent throttling to 800mhz using those programe. However, when using anything gfx intensive, like 3dmark06 or civ5, it will throttle semi-permanently and quite quickly (<30 mins) despite the core cpu temp NEVER reaching above mid 80s (monitored using hwinfo32 logs). I have noticed that the GPU when using 3dm06 or civ 5 maxes at 1300mhz (according to hwinfo32 logs), but of course wprime and prime95 never push the gpu past stock 650mhz speeds. I do wonder if this broken semi-permanent throttling is therefore linked to when the gpu core is boosted from 650mhz stock to 1.3ghz...? Your thoughts on this greatly appreciated as always?

 

Thanks again for your help and focus.

 

Petrov.

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5884 Posts

11-24-2007

United States of America

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Re: X220 cpu throttling problem

2011-05-23, 20:49 PM

is this under BIOS 1.11?   have you tried 1.15 yet?

ThinkStation P700      ThinkPad X1C7

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46 Posts

05-21-2011

UK

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Re: X220 cpu throttling problem

2011-05-23, 21:09 PM
It's under 1.11, I was planning on updating to 1.15 after the lenovo engineer pays me a visit tomorrow (I hope). Not that the 1.15 change log suggests anything about fixing is issue, but one never knows I suppose!

Petrov.
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78 Posts

05-15-2011

USA

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Re: X220 cpu throttling problem

2011-05-23, 21:19 PM

Erik,

 

Thanks for your assistance.  For what it's worth, I am using 1.15, and I am also experiencing periodic throttling with temperatures well below 80C.  This also only seems to occur while stressing the GPU.  My CPU only throttles momentarily, but there still appears to be no reason for it to do so.  It greatly affects the performance of whatever application is depending on it at the time.

Owner/Technology Specialist
Triple-S Computers - http://www.TripleSComputers.com
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46 Posts

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Re: X220 cpu throttling problem

2011-05-24, 11:05 AM

An udpate on this.  A Lenovo engineer came and replaced the whole system board (incl. CPU/GPU) today on my x220 (i7 version). Sadly, even after the replacement, the issue persisted (with CPU temps in the high 70s or low 80s only).

 

I am afraid to say that, to my untrained eye/mind, this suggests that this semi-permanent throttling (on at least the i7's?) is a widespread issue and not machine-specific to me...

 

I would recommend that all x220 owners (or at least i7 owners) stress test their system by running up to 4 consecutive 3dmark06 runs to see if the system semi-permanently throttles down to 800mhz. I suggest using hwinfo32 as a reliable monitoring program.

 

Petrov.

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46 Posts

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Re: X220 cpu throttling problem

2011-05-24, 11:47 AM
The new system baord was BIOS 1.06. After confirming that the issue persisted with the new system board and bios 1.06, I have flashed to bios 1.15.

Unfortunately, the issue persists even with bios 1.15 and is reliably replicated using 3dmark06 runs (even when CPU temp maxed out at 71C).

I need a refund.

Petrov.
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11-24-2007

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Re: X220 cpu throttling problem

2011-05-24, 14:52 PM

have you noticed this event occuring outside of benchmarks?   or, does it require consecutive benchmark runs to essentially force it to happen?

ThinkStation P700      ThinkPad X1C7

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78 Posts

05-15-2011

USA

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Re: X220 cpu throttling problem

2011-05-24, 15:06 PM

He stated it originally was noticed while playing Civilization 5, a very popular game which ought to run quite handily on low settings on this hardware.  I also have noticed unnecessary throttling while playing that same exact game--though mine does not remain at 800 MHz (it eventually returns, but the dips are uncalled for as temperature and power are not a problem!).

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55 Posts

05-24-2011

New York City

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  • Message 39 of 727

Re: X220 cpu throttling problem

2011-05-24, 15:40 PM

Steve can you state what is your processor? Is it the the i5 2520m or the i7? It looks like the i5 processor are only having temp throttling problem and then it will go back up while the i7 (petrov) has the permanent throttle and wont go back up unless a shutdown occurs. Just want to get this clarified. If you got the i7, then Ill say petrovs machine definitely has its own problems and until more users test for the same this cant be confirmed I guess. Not saying its not a real problem since his problem didnt even go away by changing the board. Just that the more people that get on this, the better to find out a solution if there is any.

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46 Posts

05-21-2011

UK

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Re: X220 cpu throttling problem

2011-05-24, 15:43 PM
Yes, it happens even more quickly playing Civilization 5, which is the only game I've got installed and is hardly a gfx intensive game (it's a turn based strategy game!). In any case, there is no circumstance that this occurrence is acceptable in this laptop, in my humble opinion.

Petrov.
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