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Serial Port
Posts: 32
Registered: ‎09-23-2011
Location: Slovenia
0 Kudos

Y570 - CPU weird behavior

Hi all.

Another problem with my laptop. My i7 is behaving weird. Core 1 and 2 are going weird. Don't know how to really describe it so here's a pic: http://prntscr.com/9f4yp

My windows is updated fully.

Y570 - i7, 8GB, GT555m, 750GB, Win8.1
Retired Guru
Posts: 2,090
Registered: ‎07-13-2009
Location: USA
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Re: Y570 - CPU weird behavior

What does the Task Manager-Performance tab show ?

Don't just trust that Gadget...
Serial Port
Posts: 32
Registered: ‎09-23-2011
Location: Slovenia
0 Kudos

Re: Y570 - CPU weird behavior

It shows the same.

Y570 - i7, 8GB, GT555m, 750GB, Win8.1
802.11n
Posts: 145
Registered: ‎08-04-2011
Location: Odessa, Ukraine
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Re: Y570 - CPU weird behavior

[ Edited ]

And what's wrong with its behaviour? AFAIK Windows doesn't distrubute tasks between cores equally, unless your cpu is under heavy load. Also it tends to load "real" cores, that's why even "hypertreading" cores aren't loaded. So, if your first and third CPU are loaded up to 100% and other six are almost not loaded, that'd be strange, and what you described is IMO normal behaviour.

If you mean that CPU load increases and drops frequently, then you should just find the task which is causing it, it is not CPU's fault at all.

Serial Port
Posts: 32
Registered: ‎09-23-2011
Location: Slovenia
0 Kudos

Re: Y570 - CPU weird behavior

Thanks for answer, but i have another question about cpu. Sometimes core 1 goes up to 100% and it won't drop down. Laptop stats freezing until it completely freezes. NO heavy programs opened, not even chrome. It happenssame if I play gta iv or doing nothing. To turn it off, only option is to pulll out battery/power.

Y570 - i7, 8GB, GT555m, 750GB, Win8.1
Posts: 1,524
Topics: 38
Kudos: 118
Solutions: 50
Registered: ‎04-20-2010
Location: Jeffersonville, Indiana
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Re: Y570 - CPU weird behavior

Hi nc77

Throttling of the CPU cores is normal. From time to time I notice my i5 does the same thing. Core 1 is used while Core 2 is not and Core 3 is and Core 4 is not.

I too have also noticed when one of the cores reaches 100% it is slow til whatever process is doing it finishes.

My PC is custom built and not Lenovo so I think it would be safe to say its normal. Not a driver or program issue.
IT Specialist and Consultant
Lenovo Tablet Evangelist
Current Machines: IdeaCentre A300, ThinkPad Tablet, IdeaPad U410, and Yoga 3 Pro Touch

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