Welcome to our peer-to-peer forums, where owners help owners. Need help now? Visit eSupport here.

English Community

ThinkPad NotebooksThinkPad: X Series Laptops
All Forum Topics
Options

46 Posts

05-21-2011

UK

936 Signins

865 Page Views

  • Posts: 46
  • Registered: ‎05-21-2011
  • Location: UK
  • Views: 865
  • Message 21 of 727

Re: X220 cpu throttling problem

2011-05-23, 13:02 PM
Thanks erik - do you know why none of the Lenovo staff members haven't responded to this issue even to say they're aware of it but don't have a solution (or if there is a solution, to suggest it)?

Thanks for your help!

Petrov.
Reply
Options

5884 Posts

11-24-2007

United States of America

12810 Signins

291275 Page Views

  • Posts: 5884
  • Registered: ‎11-24-2007
  • Location: United States of America
  • Views: 291275
  • Message 22 of 727

Re: X220 cpu throttling problem

2011-05-23, 13:12 PM

frankly, i'm not sure it's an issue.   i've been testing my X220 for the last few minutes running benchmarks and other applications (photoshop, illustrator, solidworks, inventor, etc.) with my power plan on max performance.   HWiNFO32 shows both cores of the i5-2520M at 2989MHz or higher 100% of the time.   it's simply not dropping back to 800MHz on this power plan.

 

i'm currently using BIOS 1.15.   it was released to the web a few days ago with an update to the controller.   i would suggest updating to this version if you haven't already and reporting your results.

 

if you are still having these issues, please detail out the process one needs to take to replicate what you're seeing.   i've tried the method above and am not seeing any problems with my power plan set to 100% on both the maximum and minimum processor speed.

 

if i'm not testing correctly, having a detailed list of steps to take would help.   thanks.

 

 

(edit: typo)

ThinkStation P700      ThinkPad X1C7

Reply
Options

76 Posts

08-25-2010

Chicago

384 Signins

1374 Page Views

  • Posts: 76
  • Registered: ‎08-25-2010
  • Location: Chicago
  • Views: 1374
  • Message 23 of 727

Re: X220 cpu throttling problem

2011-05-23, 13:16 PM

Hwinfo32 isn't accurate. While it shows no throttling, under normal circumstances CPU-Z shows the processor throttling down to 800mhz when not really loaded and this is very clearly reflected in ssd performance. Turning off CPU Power Management or Speedstep shows in CPU-Z that the throttling is prevented and there's accordingly a substantial gain in ssd performance.

Reply
Options

5884 Posts

11-24-2007

United States of America

12810 Signins

291275 Page Views

  • Posts: 5884
  • Registered: ‎11-24-2007
  • Location: United States of America
  • Views: 291275
  • Message 24 of 727

Re: X220 cpu throttling problem

2011-05-23, 13:30 PM

i've found hwinfo32 to be more accurate than CPU-Z.   if you're relying on CPU-Z then i suggest finding more apps besides these two to see how they react so there's a clear concensus on what's considered an accurate measuring tool.

 

regarding this being "very clearly reflected in SSD performance," what app(s) are you using to benchmark this metric?   to replicate the issue, the exact processes you're using needs to be known.

 

(edit: typo - apparently i can't type at all this morning)

ThinkStation P700      ThinkPad X1C7

Reply
Options

46 Posts

05-21-2011

UK

936 Signins

865 Page Views

  • Posts: 46
  • Registered: ‎05-21-2011
  • Location: UK
  • Views: 865
  • Message 25 of 727

Re: X220 cpu throttling problem

2011-05-23, 13:37 PM

erik, thanks very much for joining the discussion - I sincerely appreciate it.

 

I can use both cpuz or HWinfo32, and both show the "semi permanent" throttling I've been referring to (ie throttling that is cured only by a COLD reboot. Eother way, you can clearly see the impact when the cpu is throttled, the whole system becomes very slow - as you'd expect when the CPU runs at a 25% of the speed it was before the throttling...

 

erik, assuming you don't want to buy a game like civ 5 (my only installed game, hence why I keep mentioning it), then another reliable way to trigger it for me has been MULTIPLE back-to-back (as little gas between as possible) runs of 3dmark06. Usually after about the 3rd run, the CPU is permanently throttled down to 800mhz (visible with i) your own eyes given how slow things become, or ii) using HWinfo32, or even iii) ThinkVantage's own Diagnostic/System Information tool (see under "motherboard").

 

See my other post on a related thread re my current theory that it's related to gpu core rather than CPU temp....

 

Petrov.

Reply
Options

76 Posts

08-25-2010

Chicago

384 Signins

1374 Page Views

  • Posts: 76
  • Registered: ‎08-25-2010
  • Location: Chicago
  • Views: 1374
  • Message 26 of 727

Re: X220 cpu throttling problem

2011-05-23, 13:42 PM

In my case, CPU-Z is backed up by Crystaldiskmark. Random performance (the most important in a boot drive) is the one that's affected.

 

Standard/default configuration. CPU-Z shows throttling between 800mhz and 3.0/3.2ghz, Hwinfo32 shows no throttling:

 

 

CPU Power Management or Speedstep turned off in BIOS. CPU-Z and Hwinfo32 show no throttling:

 

Reply
Options

5884 Posts

11-24-2007

United States of America

12810 Signins

291275 Page Views

  • Posts: 5884
  • Registered: ‎11-24-2007
  • Location: United States of America
  • Views: 291275
  • Message 27 of 727

Re: X220 cpu throttling problem

2011-05-23, 14:57 PM

petrov - i don't own any games but will see what i can find to try and replicate your findings.   give me some time though as i've already got a busy week ahead of me.

 

vinuneuro - the two results you posted are filled to different capacities.   some SSDs can slow over time or slow as they become filled.   what model SSD are you using here?   can you provide back-to-back benchmarks with equal fill levels?

 

i just re-tested the 160GB intel 320-series SSD in my thinkstation and saw 20MBs and 40MB/s respectively for the 4K QD1 results.   despite this being slightly slower than my former 160GB G2 (25MB/s and 60MB/s respectively), the new SSD feels just as fast if not slightly faster.   given that 4K performance of an SSD is hundreds of times faster than a hard drive, i'm curious what you're doing with your system that you're noticing degredation outside of benchmarks.   are there any applications i can try to replicate exactly what you're seeing?

 

since you point out that 4K is important for boot, are your boot times being affected?   if so, what is the net difference in boot times between PPM turned on and off?   are you using UEFI or legacy BIOS?

ThinkStation P700      ThinkPad X1C7

Reply
Options

46 Posts

05-21-2011

UK

936 Signins

865 Page Views

  • Posts: 46
  • Registered: ‎05-21-2011
  • Location: UK
  • Views: 865
  • Message 28 of 727

Re: X220 cpu throttling problem

2011-05-23, 16:05 PM

erik, vinuneuro, see the link/pic for the screen capture of my system when it's semi-permanently throttled down. Note that the system is set to Max Turbo and both HWinfo32 and thinkVantag System Information report it to be running at 800mhz, and that the 3dmark score is in the low 2000's (versus usually around 4,000 without throttling). To emphasise, this is with both battery and AC plugged in together and the system will not rethrottle back above 800mhz without a cold boot. This was achieved after 3 runs of 3dmark06.

 

http://imageshack.us/f/805/throttling.png

 

Petrov.

 

Moderator Note: Fixed the link.

Reply
Options

46 Posts

05-21-2011

UK

936 Signins

865 Page Views

  • Posts: 46
  • Registered: ‎05-21-2011
  • Location: UK
  • Views: 865
  • Message 29 of 727

Re: X220 cpu throttling problem

2011-05-23, 16:21 PM

Attached with proper link, hopefully!

 

Reply
Options

5884 Posts

11-24-2007

United States of America

12810 Signins

291275 Page Views

  • Posts: 5884
  • Registered: ‎11-24-2007
  • Location: United States of America
  • Views: 291275
  • Message 30 of 727

Re: X220 cpu throttling problem

2011-05-23, 17:25 PM

petrov - thanks for the screenshot.

 

if i'm understanding this correctly, with CPU power management turned on in the BIOS the CPU will run at 800MHz until stressed.   with PM turned off it will peg itself at maximum clock speed and stay there, plus small bursts of turbo boost.   is this correct?

 

am i wrong in thinking that this is simply a function of CPU power management?   or, am i missing some other detail?

 

additionally, this "throttling" is also seen when a system is pushed to certain thermal levels.   will your system recover from this reduced state if left to cool for a period of time?

ThinkStation P700      ThinkPad X1C7

Reply
Forum Home

Community Guidelines

Please review our Guidelines before posting.

Learn More

Check out current deals!

Go Shop
X

Save

X

Delete

X

No, I don’t want to share ideas Yes, I agree to these terms