[R519] Help, CPU temperature is 165ºF (75ºC)

Hi,

My R519 is only 6 months old but it is very hot already. The CPU is at 165º Farenheit (75º Celsius). The Hard Disk is at 103º F (40º C). The ambient temperature is around 72ºF (22ºC).

I am very worried. I am using Windows 7 x64 Ultimate. The battery plan is "Balanced". And I really don't know what may be causing this. It happens with just the browser (Chrome) open.

The CPU is Intel T4200 Penryn (Dual Core) at 2.0 GHz. 4 GB RAM if that is of any relevance.

If you have any advice I would appreciate it.

 

The review here suggests that the R519 tends to run a bit warm.

I suggest you try following the undervolting guide? RMClock will work fine with that old CPU.

John

 

Thanks! Do you know if 165ºF/75ºC is acceptable then? I read that from 80º it can burn. The review doesn't say much and I am worried. If I do what that guy says it will be risky.

Any idea where I could ask, some forum of very expert people about these temperature issues?

Thanks a lot again.

 

75C is hot by my standards, but not dangerous for the CPU. I have a Toshiba R500 in my notebook collection in which the CPU can reach 90C under load (it has a very small fan). On the other hand, the P8600 in my Dell E6400 struggles to reach 70C under load (partly because it is undervolted). I think Intel set the CPUs to automatically throttle at somewhere close to 100C.

John

 

Thank you very much.

 

My laptop is on fire. I was on Ubuntu 10.04 x32 and it was burning and it suddenly closed up automatically.

On Windows 7 the temperature is around 65-70º and goes up to 85º if I run flash videos.

Outside temperature is 31º, room temperature is 28º.

I am desperate, what can I do? It is really hot. If I send it to the customer service they may say it is ok at 65º and besides I would need to completely uninstall and delete lots of things for privacy and security matters. Basically format and start from zero.

Please, advice.

Thank you.

 

The cooling system isn't working properly. I would consider a light usage CPU temperature of over 50C to be excessively high and is likely to shorten the life expectancy of the computer.

Either you have got a manufacturing problem (eg poorly applied thermal compound for the CPU) or the cooling system is clogged up with dust. This shouldn't happen in 6 months but if you have been using the computer on a soft surface (such as bed clothes) then it can suck up a lot of fluff and you end up with the problem illustrated in this thread.

John

 

Thanks John. I took the laptop to the shop (The Phone House). They had it for 2 weeks and I got it back today. They say they sent it to Samsung to repair but Samsung says they never had it with them, so maybe TPH is lying.

TPH says they did a "burn test" for 2 hours and the temperature was normal. Still they say they opened it and it was "full of animal hair". They say they cleaned it. Well... I dont have any animals, live in a clean apartment in the city center and have always the laptop either on my lap or on top of a table.

I can't see how so much "animal hair" got inside. But the worst is that the problem persists. On idle, it is around 60º. As soon as I do anything it goes up to 80º-88º. I am using three different temperature meters programs and all three say similar temperatures.

I guess these as*holes did nothing at all and I guess that the problem is with some component that they didnt want to replace.

So... now Samsung says that they won't cover the repair for free as since TPH has opened it I have lost the guarantee rights. And TPH says that they took it to Samsung and it was Samsung's responisibility and technical team.

Samsung told me to ask TPH for a "tracking number" but TPH says they don't have it...

As*holesssssssss... It's always the same. I knew something bad was going to happen. That is why I was trying to fix it by myself before sending them the laptop.

What do you think John?

Thank you very much.

 

I found a site named cpu-world..com where there is this information about the Intel T4200 processor that the R519 has, and it says that the temperature range is fro 0º to 105º.

See: http://www.cpu-world.com/CPUs/Penti...m Dual-Core Mobile T4200 AW80577GG0411MA.html

If 105º is the maximum, does it mean that up to 90º is still without risk to fry the laptop? After the bad experience of sending it to repair for nothing, I don't know what to do.

Thanks in advance.

 

Yes, Intel CPUs can run that that temperature although heat is not good for the long-term life of electronic components.

I can't mediate in your dispute with your local repair shop but, unless they are a Samsung authorised repair center, they might not do any better than you could do yourself.

I suggest that you investigate my previous suggestion to follow the undervolting guide, although that only works with Windows. Also make sure that you are using a balanced power profile and not best performance so that the CPU can cool down when it is not loaded. You can get an indication of the CPU power consumption by running RMClock while the computer is on battery and checking the battery power drain on the battery info page. Idle power should be 10 to 20W depending on the other hardware, perhaps going to 45W under full CPU load.

John

 

Thanks a lot!

I did what you said but I dont understand anything, so I took some screenshots of RMClock for you to see.

It is a fresh morning and the ambient temperature seems to be very important. The CPU is around 50º only, the heat has been awful lately (up to 40º outside), but anyway the problem is there as soon as I do something requiring energy (watching a movie, antivirus...) I had to stop Defraggler yesterday because it was at 85º.

I noticed that the CPU use was very low and got up to 60% (and remains even idle) when on battery. Is this normal? (Please know that my technical knowledge is zero).

See:

 

The idle temperatures (45C) and power consumption (12W) are perfectly normal. The step is to undervolt the CPU in order to reduce the temperatures when under load. The procedure is described in the undervolting guide.If the SLFM voltage is lower than 1.0875, you can try to reduce the minimum voltage on the profile page while I would expect that the maximum voltage can be reduced below 1.065V.

You can very quickly get an indication of undervolting potential by running a program such as Prime95 to fully lower the CPU and then dropping the maximum voltage in RMClock by a step every few seconds, keeping note of where you are at (you should also see the CPU temperature dropping). When the computer crashes or BSODs then you know you have gone too low. Normally, 3 steps above that voltage is safe.

John

 

A million, million thanks John.

It's chinese to me what you say, so I will try to go through it slowly when I have time.

However, you said that that procedure of underlvotling is dangerous, and given that I am so illiterate it sounds scary.

I will let you know, a million thanks again for your great help.

 

No it's not dangerous. Too low a voltage will cause problems and you need to find where that is so you do that test without anything else running. Learning to undervolt is a bit like learning to ride a bicycle: A bit challenging to start with but easy once you know how.

John

 

Thanks again. It's going to take me long to go through it but I'll try when I have time.

I wanted to ask you something else if you don't mind.

RMClock shows between 5º and 10º less in the CPU temperature than 3 other programs I have tried (SIW, CPUTemp, Notebook Hardware Control).

Is RMClock the most reliable of all from your experience? I mean the difference is important. 5-10º.

Thanks

 

Different temperatures are the result of assumptions about the offset value between the reported temperature and the true value. I would tend to assume that new programs are likely to include the correct data for different hardware and therefore point you towards HWmonitor (which happens to give the same CPU core temperatures as RMClock for my P8600).

John

 

Yes, the values of HWmonitor ar ethe same ones than the ones of RMClock.

This means that if this the real temperature, the problem is not so bad. 5-10º less.

The temperature seems to be much more moderate lately, I don't know why. 50-60º on average if I dont run flash or too much YouTube. Still I get 80-85º easily when I for instance run the antivirus, run Defraggler or copy big files to another partition or USB.

Now, my system only closed down when I was using Ubuntu 10.04. It was on fire, and at an outside temperature of around 37º (30º room temp perhaps, deadly hot). Since my R519 runs Linux so slow I guess it has the drivers compatibility problem for the Intel 4500 graphic card mostly and maybe that is why it closed.

I uninstalled Ubuntu that day and only have W7 x32 now in balanced energy mode.

Your help is really great. A million thanks.