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10 Posts

05-21-2014

Guatemala

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y510p problesms PLEASE HELP!

2014-05-21, 20:18 PM

Okay, so i bought a new lenovo y510p with gt755m SLI, 8gb RAM and an i7-4700MQ @2.40Ghz with turboboost to 3.20Ghz.

The problem that I have is that everytime I try to game on it, the CPU usage is from 10-30% and the clock rate jumps between 0.77Ghz and 2.4Ghz, staying mostly @0.77Ghz. This is even when I just turned on the pc and is cold to the touch. So because of that I discarded overheating. However, when I checked my CPU temps in HWiNFO64 while gaming, all my cores were at the 70-80-ish Celsius and the clock rate was @0.77Ghz, and every time I minimized the game, the clock jumped back to 2.35 Ghz and the temperatures also jumped to the 90-ish Celsius. This is confusing to me because the CPU is working better in the supposed higher temps. Also the temperatures are jumping back and forth 10 degrees in just seconds!!

 

I'm uploadng the screen captures of some of these readings. See that the captures were taken with 1 minute of difference.

 

Link to picture

 

Link to picture

 

Now I'm wondering if my motherboard sensors are broken. Please help me, is this happening to anyone else? is it a bug? or is it hardware related?

 

THANK YOU IN ADVANCE! :)

 

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10 Posts

05-21-2014

Guatemala

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Re: y510p problesms PLEASE HELP!

2014-05-21, 20:24 PM

I was also woondering if my cpu was in a power saver mode or similar

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966 Posts

01-28-2013

United States

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Re: y510p problesms PLEASE HELP!

2014-05-22, 0:54 AM

Your CPU is reaching 99 degrees max

 

The Intel chip itself is designed to operate at 100% Max which when reached, results to forced shut down. In short, it's behaving the way it should in case of temps reaching thermal juction temp (100 degrees Celsius)

 

Put some very cold air underneath your laptop and you should see no problems with CPU frequency.

Lenovo Y470: i7-2670QM | 8 GB DDR3 1333 MHz RAM | Nvidia GeForce GT 550M | 500 GB 7200 RPM Seagate HDD | ASUS PCE-AC56 802.11ac Network Adapter | Windows 7 Professional 64-bit
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10 Posts

05-21-2014

Guatemala

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Re: y510p problesms PLEASE HELP!

2014-05-22, 1:08 AM

You are right, thats how it should behave. But as you can see it underclocks when its at 82 C. and it sets it bac @2.4Ghz when its at 92C. Also, it says its burning hot and 1 second later the readings can jump 15 degrees lower or even higher. I don't think those readings are correct. Can the CPU really change 15 or 10 degrees within 2 or 3 seconds?

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10 Posts

05-21-2014

Guatemala

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Re: y510p problesms PLEASE HELP!

2014-05-22, 1:14 AM

 

Link to picture

 

Can you please check this? the maximum frequency changed 3 times in less than a minute by minimizing and maximizing crysis 2. The CPU usage has never gone beyond 40% idk how temps change so abruptly 

 

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236 Posts

05-09-2010

Cochrane

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Re: y510p problesms PLEASE HELP!

2014-05-22, 1:18 AM

How hot is your room temperature?  25C or higher?  Your first screen shot shows that 3 of your 4 cores have reached the thermal throttling temperature.  Your CPU is running way too hot.  At these temperatures your CPU will start to thermal throttle which immediately drops the CPU down to 798 MHz.

 

You have to find a way to reduce your CPU temperature.  You might need to replace the thermal paste between the CPU and the heatsink and you will need to use a cooling pad.  If your room temperatures are high, this might not be the laptop for you.  It has great specs on paper but it runs extremely hot unless everything is perfect.  

 

Edit - Yes, core temperatures can change very rapidly when these CPUs go from idle to load.  Haswell CPUs run hot at the best of times.

 

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10 Posts

05-21-2014

Guatemala

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Re: y510p problesms PLEASE HELP!

2014-05-22, 1:25 AM

My room temperature is around 12 C and I do have a cooler. Thats what I find odd, because as the readings show, my laptop seems to be burning hot even though I don't feel it hot. BTW I just bought this laptop and haven't been able to play ANY game on lowest settings because of this problem. Even when I start to play just after it boots, with about 2 minutes of CPU runtime, temps seem to instantaneously be 99 C

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10 Posts

05-21-2014

Guatemala

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Re: y510p problesms PLEASE HELP!

2014-05-22, 1:33 AM

Really? Because this thing is changing from boot temps (30s-40s) to 90-s in about 2 seconds, and going back to 60-s in around 2 seconds too. Is that really possible? 

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236 Posts

05-09-2010

Cochrane

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  • Message 9 of 14

Re: y510p problesms PLEASE HELP!

2014-05-22, 1:38 AM

Modern 4th Gen Intel CPUs are tiny.  Intel locates their core temperature sensors on the hottest spots on the core.  When your core temps reach the thermal throttling temperature at 100C, your laptop will not feel like it is burning hot.  

 

If your room temperature is only 12C then there is a good chance that your CPU heatsink is not making full contact with your CPU.  The only way to check for this is to disassemble your laptop and redo the thermal paste.  If you do this yourself then it will likely void the warranty.  

 

The only option is to return it.  Your laptop is not usable as it is.

 

Edit - With a loose heatsink you can go from 20C to 100C in about 1 second.  Intel individually calibrates their core temperature sensors.  The chance of them all being bad is slim to none.

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10 Posts

05-21-2014

Guatemala

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  • Message 10 of 14

Re: y510p problesms PLEASE HELP!

2014-05-22, 1:44 AM

Ok so it won't feel burning hot then. But what about the temperature jumps from 60s to 90s in seconds? Is that really normal? I mean can really a CPU get 90s hot in 2 seconds and then cool down to 60s in also 2 seconds? im sure these readings are not right, I mean can a haswell CPU really have 30 degree changes back and forth in just seconds?

 

Yeah i think i'll return it, thank you anyways!

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