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10 Posts

01-10-2016

Denmark

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Y50-70 - CPU Throttle issue and BSOD

2017-04-12, 12:20 PM

Hey everyone!

 

I got this lenovo y50-70 laptop about 1-1,5 years ago. Now I am facing a few serious problems with it.

 

Problem 1: The cpu is acting exactly the opposite of how it should be. While browsing or just doing whatever not highly consuming process, the CPU is finely working around 3.5 Ghz, operation voltage is at 1.068V. However, as soon as I start building, or do anything that would need any more power, suddenly I see that my cores drop to 2.6Ghz and voltage is as low as 0.78V.

This made me curious, and started testing with prime95, cpuz, Intel Xtreme tuning utility and so on. Each of them showed the exact same result, that as soon as the CPU should perform, it drops down to 2.6Ghz, while the temps are more than fine. None of the cores are above 65 degrees Celsius! This is not a simply bothering problem, but a serious one also. Software and tools used to track and monitor information regarding system health: HWInfo64, Intel XTU, Aida64 and CPU-Z.

 

Problem 2: The laptop is slow, like way too slow. Opening apps, files, documents, whatever takes up to minutes some times. While I had windows 8.1 on the HDD I had response times between 10K and 15K ms and insanely low write and read speeds. I gave it a full clean reinstall to windows 10 and now my response times are fine. I tested with HD Tach very recently. See the attached results. I went on and ran memtest over night as well, in the morning it showed that it found 0 errors. Since the windows 10 reinstall however I am facing daily BSODs, like between 2 to 6 in an 8 hour period. The error message on the BSOD is "page fault in nonpaged area". I looked around and found that issue could be in the page file setup, so following the recommended setup I ended up having a few less BSODs, like 2 to 4. However the problem still exists and is rather bothersome.

 

I would like to find a solution for both of the problems, and preferably as soon as possible due to the limitations I am facing due to the poor overall performance of the laptop.

 

If you can add any thoughts, ideas or help me in any way, please do so! :)

 

Mod's Edit: System model added to the front of Subject line to improve visibility / clarity.

 

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69 Posts

03-11-2017

United States of America

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Re: CPU Throttle issue and BSOD

2017-04-12, 13:20 PM

For your CPU issue, for a test, try setting your power plan to high performance and/or go into your BIOS and disable speedstep. Either one of these will force your laptop's cpu to maintain a constant maximum speed. This may also fix your BSOD issue as well but no guarantees. Letus know the results of your testing.

 

Now as far as the CPU temp goes, make sure you vents are clean and maybe even check inside the case as well.

 

Good luck,

 

newlaptop

 

 

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10 Posts

01-10-2016

Denmark

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Re: CPU Throttle issue and BSOD

2017-04-12, 13:29 PM

Hey,

 

Thanks for your answer!

 

I am always running my laptop on high performance mode. The BIOS on the laptop is rather....strict. It has no option to turn on/off Intel Speedstep(or at least I didn't find it now).

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69 Posts

03-11-2017

United States of America

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Re: CPU Throttle issue and BSOD

2017-04-12, 16:21 PM

OK, check to make sure your settings are the same as my high performance power pla. If not, reset your to defaults and check again:

 

 

If they are the same, then your rig must be encountering a thermal condition. So, check you event viewer for any CPU thermal related logs.

 

Good luck,

 

WOT

 

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10 Posts

01-10-2016

Denmark

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  • Message 5 of 9

Re: CPU Throttle issue and BSOD

2017-04-13, 10:55 AM

Hey.

 

I checked the power settings as you said, it is the same as yours.

I went through the event viewer also, only 1 thing I found that seemed weird. It has the source "Kernel-Processor-Power", and its description is the following: "The speed of processor 0 in group 0 is being limited by system firmware. The processor has been in this reduced performance state for 66 seconds since the last report." I have this warning for all 8 logical processors in the same time.

 

Thermal events are not possible, there is no trace of it in the event logs and I am continuously monitoring the CPU with HWInfo64, and no thermal event has ever occured. The temps never exceed 65 degrees even when stress testing (which is perfectly reasonable with that 2.6Ghz only...)

 

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69 Posts

03-11-2017

United States of America

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Re: CPU Throttle issue and BSOD

2017-04-13, 14:30 PM

Probably an event ID 41, eh? If so, that's a power-realted issue. Does this CPU step down issue happen when you have your laptop plugged into AC and on battery as well? 

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10 Posts

01-10-2016

Denmark

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  • Message 7 of 9

Re: CPU Throttle issue and BSOD

2017-04-13, 15:51 PM

My laptop is always running on AC power :) Not using it outside work mostly, so I have it plugged in all the time when I am working on it.

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11 Posts

07-03-2017

United States of America

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  • Message 8 of 9

Re: CPU Throttle issue and BSOD

2017-07-03, 23:13 PM
did you find the solution to your laptop as Im having the same issue
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10 Posts

01-10-2016

Denmark

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  • Posts: 10
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  • Message 9 of 9

Re: CPU Throttle issue and BSOD

2017-07-04, 21:23 PM

The only solution I've found was to use the throttle stop app. The cpu still isn't reaching 75 C while running around 3.3-3.4GhZ, so I deemed it to be safe to use for myself. As other have said as well though, you are responsible for whatever it may cause.

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