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56 Posts

05-12-2011

USA

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Re: X220 cpu throttling problem

2011-06-01, 19:42 PM

wrote:

You might be right, but still the problem shouldnt exist not even in extreme cpu test after the test is stopped or even in some casual game playing as some have reported. One question, what are your settings on power manager for both ac and battery? I thought that when you choose optimized and on battery you have balanced performance that the cpu wont use turbo boost. Am I wrong? What is the best setting for battery saving and to get to 3.4ghz at the same time. On balanced setting, can the cpu get to 3.4ghz if needed or only on turbo or max turbo setting. I need to learn more about the power settings. I believe that when on maximun performance maximun turbo setting, even at idle, the cpu will be running at 3.2ghz and over and on optimized balanced setting, it will be at 800mhz when idle and reach 2700mhz when needed. Or will it hit 3.4ghz if needed? Someone correct me if Im wrong. Thanks.



Checkout the "Throttlestop" utility.  The author of the program makes a point that hwinfo32 and cpu-z, do not use intel's perferred method of monitoring cpu usage and clockspeed reporting.  Not only can it prevent your cpu from throttling, (cant do anything about the 650mhz stock gpu speed), but it has monitoring capabilites to watch your cpu mhz reading more accuratly.

 

From what I can gather, the most important setting is the Fan speed setting.  Keeping it at maximum performance fan speed will allow the fan to hit higher speeds for longer periods of time, to allow the TDP to be reached and stay there.  Balanced mode and reduce noise fan modes don't seem to let the fan run as high or as long as maximum performance fan mode does.

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99 Posts

05-13-2011

Denmark

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Re: X220 cpu throttling problem

2011-06-01, 19:56 PM

I am sorry guys, but i am not that advanced - when i sit at home with the X220 in the dock with external power and monitor, i just slide the slider fully left, like this:

 

Link to picture



Then i have these informations on HWiNFO32:

 

Link to picture

 

When i am 'on-the-road', i just use my own 'powersaver' settings with a power comsumption of 6-8watt = 10-12 hour on the battery.  The performance is ofcourse not as 'wild' as at home with mains connected, but it is fine for me.

But since i now have installed the monitoring tools, i will watch how the performance is when i am on battery.  I just tried to unplug the mains power and noticed, that the CPU clock went up to 2.7Ghz when doing some 'photo shop' work.

But i will return with more info in a few days.

 

/Henrik - Denmark

 

Moderator note; picture(s) totalling >50K converted to link(s) Forum Rules

/Henrik - Denmark
X220 - i7-2620, 8GB, 128GB Samsung 830 SSD (I just LOVE my X220!) - and still after 6 years of service, running Win10 like a charm!
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55 Posts

05-24-2011

New York City

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Re: X220 cpu throttling problem

2011-06-01, 20:44 PM
Petrov,

  One question (or two), on your screenshot on page 3, how do you get that lenovo advanced system detail where you see the cpu speed using the lenovo software?

Also, do you think I should try to disable/enable cpu power management and speedstep in the bios (both on, both off, either on) and see what happens. And if by doing this, the throttling issue gets resolved (same as OP), what are the consequences in doing this? Only waste more battery?

Thanks.
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55 Posts

05-24-2011

New York City

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Re: X220 cpu throttling problem

2011-06-02, 4:09 AM

Ok guys, here is something interesting. I turned on my machine to start doing some testing. At first I performed windows updates and lenovo updates.  I have not performed any bios update yet, still on bios 1.12. After everything was done, I went and plug in the ac adapter for about 45 minutes without doing anything. Then I went and started the Thinkvantage Diagnostics-->System Tests-->System Stress Test. During the test, you can see that the cpu is performing at its max around 2800-31000mhz during the test and the gpu also around 1000 most of the test. It also dropped many times to 797mhz/650mhz (and I mean many times, I'll say a lot) but it always goes back to normal speed during the test. When the test is about 90% complete, you can see that both the cpu and gpu (graphics card test) are the only tests left running at the same time. At this point, the gpu stays at 1200 and the cpu throttles to stock 2700mhz. It stays like that for like a 3 minutes until the test is complete. In this case, everything seems to be working fine. All tests passed. I tried the test twice back to back, both time got the same results. Also, got a max temp of 92.


After, I ran occt and got the perma throttle within 4 minutes. I think the thinkvantage test doesnt test the cpu/gpu at the same time long enough to experience the throttle to 800mhz/650mhz. But it does throttle correctly to 2700mhz/1200mhz which never happens while running occt. I only get throttle to 2700/1050 when not experiencing throttle and while running prime95 and occt at the same time. I guess it is hard to explain what the hell is going on.


Then, I performed my trick of unplugging/replugging adapter to get back to normal. Test again with occt, no throttle in 15min running the test. Put the computer to sleep while ac plugged as suggested by a user, after wake up, ran occt again, got the perma throttle in 5min. I guess unless I leave the computer running there is no throttle after the 1st perma throttle and the unplug/replug. But if I put the computer to sleep/hibernate/restart/shutdown, then again I get the perma throttle on the 1st run of occt. By the way, on that last replug/uplug, I did it while occt test was running and it made no difference, got back to normal and continue running occt for the next 15min and no throttle experienced.

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46 Posts

05-21-2011

UK

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Re: X220 cpu throttling problem

2011-06-02, 10:26 AM
I'll be bowing out with my own testing and whatnot for now. My x220 (i7) RMA/refund pickup is tomorrow. I'll continue to lurk and contribute as a prior-owner, as I'm keen to see the throttling issue, in particular, be resolved. I just don't want to bear the risk that it's not resolved given it has a real impact on my day-to-day usage.

If Lenovo can come up with a fix for the throttling issue on the i7, I'll repurchase an i7 version (I really want the power and USB 3.0) asap as I think it has the potential to be a peerless laptop in the current market.

Thanks,
Petrov.
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213 Posts

12-06-2007

United States of America

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Re: X220 CPU throttling problem

2011-06-02, 11:34 AM

Can you guys tell me if the CPU throttling issue gets reset (even if temporarily) if you remove and replug the AC adapter?

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46 Posts

05-21-2011

UK

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Re: X220 CPU throttling problem

2011-06-02, 11:38 AM

Ken - yes it gets reset. On my system, it then throttles again under GPU/CPU combined load as discussed - but after a replug the CPU bumps back to 3.3ghz from 800mhz.

 

Petrov.

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55 Posts

05-24-2011

New York City

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Re: X220 CPU throttling problem

2011-06-02, 12:22 PM

wrote:

Can you guys tell me if the CPU throttling issue gets reset (even if temporarily) if you remove and replug the AC adapter?


 

Yes, the issue gets reset on my system with a unplug/replug and the throttling issue does not happen again until a shutdown/restart/sleep/hibernate occurs. Thats on my system, others have reported the throttling coming back again when stressing cpu/gpu again even after the reset.
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213 Posts

12-06-2007

United States of America

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Re: X220 CPU throttling problem

2011-06-02, 12:37 PM

Okay, I want to let you guys know we are working on a fix to this. As the release get's closer I'll post here.

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46 Posts

05-21-2011

UK

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Re: X220 CPU throttling problem

2011-06-02, 12:42 PM

Thanks Ken - do you think it'll be a software/bios fix, or more likely a hardware fix?

 

Petrov.

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