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46 Posts

05-21-2011

UK

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Re: X220 cpu throttling problem

2011-05-24, 15:47 PM
I personally doubt the problem is specific to my machine, as thhe lenovo engineer replaced the whOle system main board (incl CPU, gnu, fan, etc) and the problem persisted....

I've actually not seen any i7 x220 owner run the same tests and conclude there is no problem for them.

Petrov.
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55 Posts

05-24-2011

New York City

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Re: X220 cpu throttling problem

2011-05-24, 16:20 PM

Petrov, I understand its definitely not only your machine with the problem. Im just trying to get more people to try the same tests as you have, especially on the i7. Also, just trying to clarify if the i5 machines only get the temporary throttling and the i7 people get the permanent one as yours have. Hopefully Ill get my i7 this week and be able to perform the tests and see what happens. Again, appreciate your finding on this.

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55 Posts

05-24-2011

New York City

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Re: X220 cpu throttling problem

2011-05-24, 17:39 PM

Ok, I did some research on this i7 2620m processor and it appears that the macbook has/had a similar problem when running windows/boot camp, but not when running OS X. Also, it is stated there that this problem does not happen with the i5 processor. You can read more about this in the following reviews/articles, especially the 1st link. It states that the problem exists in windows.

 

http://www.notebookcheck.net/Review-Apple-MacBook-Pro-13-Early-2011-2-7-GHz-dual-core-glare-type-screen.51631.0.html

 

http://www.movmag.com/1521/macbook-pro-13-3-inch-review-three-steps-in-front-one-back

http://i.tuaw.com/2011/03/21/macbook-pro-crashes-apple-disables-turbo-boost-under-windows/

 


And according to this thread it also appears the the gpu was the culprit and it was fixed with an update. It also appears that some people still having problems even after applying the update.

http://forums.macrumors.com/showthread.php?t=1120543&page=1

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3538 Posts

07-12-2010

Malaysia

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Re: X220 cpu throttling problem

2011-05-25, 8:45 AM
@All,

Appreciate for those who are affected to PM me the following.

MTM:
S/N:
BIOS:
Win 7 x86 or x64 / Home / Pro / Ulti:
Power Manager:
Power Management Driver:
Power Profile:
GPU driver:

Steps to replicate -> AC plugged, use HWinfo to monitor proc speed and run 3dmark06? (any time limit set to run) Please comment if steps to replicate is wrong.

Name:
Mobile:
Email:

If you have screenshots it would be helpful as well.

//JameZ
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14 Posts

05-25-2011

USA

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Re: X220 cpu throttling problem

2011-05-25, 14:31 PM
I was excited to have ordered i7, 160 gig SSD 220 t with all the bells and whistles such as bluetooth, camera, etc. But, now I am all worried after reading about the throttling issue. Am I better off cancelling the order and going with i5 or do you think eventually this problem will be fixed via firmware/bios/driver updates?
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46 Posts

05-21-2011

UK

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Re: X220 cpu throttling problem

2011-05-25, 17:09 PM

JameZ, thanks for taking ownership (or at least leadership) of this issue on the Lenovo side. I'll send you all the details of my system (post system board replacement!). My screen shot is available in this thread anyway.

 

In terms of replicating - I have 100% replicating using sequently and back-to-back (ie de minimis gaps between) 3dmark 06 runs. Sometimes it takes one run, the most it's taken is on the 5th run, to see the semi-perm throttling. Usually it is on the 3rd or 4th run that it rears its ugly dog-faced head.

 

I also have 100% success replicating just playing civ 5 (dx 9 mode) - usually throttles in first 15-20 mins of playing...and this is a turn based strategy game which drive CPU temps no more than low 70s at most.

 

Petrov.

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46 Posts

05-21-2011

UK

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Re: X220 cpu throttling problem

2011-05-25, 19:57 PM
I've found another much more visible way of seeing the throttling issue on the i7 x220. There's a program called OCCT, which is a GPU (and CPU) testing program:

http://www.ocbase.com/perestroika_en/index.php?Download

If I run the GPU test (it's the third tab on the left, labelled "GPU: OCCT") at default settings (1027x768), you can keep hwinfo32 running and can actually watch the gpu clock go from 650mhz to 1300mhz, which generally occurs around the same time the cpu throttles down from 3.2ghz down to 800mhz!

And this throttling happens while the CPU temp is < 50C!

My tip is to arrange the hwinfo32 sensor panel on one side of OCCT and the hwinfo32 summary panel on the other side of the screen - that way you can watch all three (OCCT, GPU clock and temps, CPU frequency) things at once.

I found this rather instructive...

Let me know what you think guys?

Petrov.
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78 Posts

05-15-2011

USA

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Re: X220 cpu throttling problem

2011-05-25, 20:02 PM

Wow, this really is a major, major issue.  I am actually considering returning my unit now also and advising a couple of customers of mine to consider returning theirs as well if it isn't possible to resolve this via a BIOS update or similar.

 

I just opened Civ 5 (DX10/11 mode) and played with the temp and clock speed monitors open in HWMonitor32 and also CPU-Z.  When simply scrolling around the map, after around a couple of minutes of play, the throttling becomes very regular.  It's happening at temperatures ranging anywhere from 55C - 70C and it massively affects the user experience.  GPU clock I observed, as did you, Petrov, to also be somehow inversely correlated with that of the CPU.  This is unnacceptable and now it's really beginning to look like a major problem to me.

 

I guess I need to get you my info, JameZ.  And to think, this after setting up all of my massive amounts of production programs that I use daily (Adobe suites, Sony Vegas Pro, and a wide range of others).

 

Hmph.

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

05-15-2011

USA

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Re: X220 cpu throttling problem

2011-05-25, 20:08 PM

Actually, a correction on my part: the GPU ramps up to 1300 just before the CPU clock drops to 800.

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

05-24-2011

New York City

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Re: X220 cpu throttling problem

2011-05-25, 20:35 PM
Steve, is this still happening after your update of the intel driver. The one you mentioned on the owners thread. Also, is it the same as petrov's where it wont go back up after cooling, only after a shutdown? Thanks.
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