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4 Posts

04-04-2010

Denmark

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Re: G550 fan problem

2010-04-04, 21:35 PM

Hi

I also have problems with the noise comming from the fan - I have made the BIOS update to version 2.51 (windows 7 - 32) and it did help - instead of turning off and on every 10 to 20 sec. it now can be quite (turned off) for minutes at a time, however it also runs for several minutes when it runs.

 

The laptop would be acceptable/perfect for me, if it was possible to control the fan speed to for example set it to half the current speed (and noise) - then offcause it would have too run for a longer time, but since that would be at a lower speed and therefor also less noise it would be a better solution.

 

The Bios update that Lenovo has done proves to me that they have focus on the problem and I therefor hope that they will make it possible to add the feature of reducing the fan speed. Currently I suppose the fan has 3 levels: off, half speed and full speed.

 

Best regards Henrik

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4 Posts

04-04-2010

Denmark

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Re: G550 fan problem

2010-04-04, 21:46 PM

I just want to add:

 

current experienced fan speed levels:

 

1) Off

2) Normal/half speed (the speed that I normally experience)

3) Full speed (the speed that I experienced during the BIOS update)

 

What would be nice to be able to choose as fan speed levels:

 

1) Off

2) 1/4 speed level (Half of current half speed level or what I experience as normal speed level)

3) 1/2 speed level (Current half speed level)

4) Full speed

 

As mentioned option 2 would probably require the fan to run for a longer period of time, but to me that would be acceptable since it would be at a lower noise level

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70 Posts

03-30-2010

UK

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Re: G550 fan problem

2010-04-04, 22:11 PM

Hi i also have a fan problem, I just recently got this laptop which is a G550 and looked on the website and updated the bios.

 

But when i play in game or just sitting in windows 7 desktop the GPU can hit 70c's and the CPU is hitting 50c's.

 

Is there any fix for the fan issue?

 

I'm on the 2.51 bios which was meant to have this problem kinda sorted?

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9 Posts

04-01-2010

Brazil

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Re: G550 fan problem

2010-04-06, 2:56 AM

The problem you guys are having with the fan is because of the notebook's design. The way it is built makes it heat up very quickly. If you take a look around the notebook, on its sides and bottom, you will see that there are only two airflow entrances. From what I know of notebooks, they are very poorly made. I don't think it is hard for the developers to put airflow entrances on the top side of the notebook. That would really help the heating problem. Instead, they put them on the bottom, where there is little amount of cool air to be sucked in the notebook and used to cool it off.

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70 Posts

03-30-2010

UK

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Re: G550 fan problem

2010-04-06, 12:59 PM

The heat issue could be solved with a bios update like on desktops where you can set when the fan kicks up and what speed.

 

If they did this it would be easier or better still if they still want the bios like it is, is to set rules for temps in three stages.

 

So if the CPU/GPU hits 50 the fan will come on at a slow fan speed enough to cool it to say 45 then switch off.

Then if the CPUGPU hits 60 it goes on half speed till it chills to 50 then the fan changes speed to the slow fan speed.

If it then exceeds 70 its full bore on the fan till it drops to the temps above.

 

I have seen 79c's on my graphics card and on cpu 60c on this laptop. Now on my desktop i have the bigger brother of GFX the 240GT which on full load and overclocked to max on air stays around 35c.

 

Personally the way the Fan is made if it looks like the ones in the videos i have seen on the youtube is of poor design. But the above would semi sort the issue.

 

As the heat from the CPU transfers to the GPU when it really should of been the hit from the CPU when striaght to the fan and not to go around through the GPU to the fan.

 

If the enginners need a helping hand i'd gladly help.

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4 Posts

04-04-2010

Denmark

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  • Message 526 of 588

Re: G550 fan problem

2010-04-06, 15:28 PM

Today I wrote the below to Lenovo:

 

To solve the problem I think that a new fan speed level needs to be introduced:

 

Current experienced fan speed levels:

 

1) Off

2) Normal/half speed (the speed that I normally experience today when the fan runs)

3) Full speed (the speed that I experienced during the BIOS update)

 

I would wish that it was possible to choose between the below fan speed levels - still having the BIOS 2.51 solution with longer off time and hence longer run time of the fan.:

 

1) Off

2) 1/4 speed level (new speed level -half of number 2 above)

3) 1/2 speed level - same speed as today - number 2 above

4) Full speed - same speed as today - number 3 above

 

As mentioned option 2 would probably require the fan to run for a longer period of time, but to me that would be acceptable since it would be at a lower noise level. But I think that the option 3 (1/2 speed) should still be an available option, since some might prefer that.

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26 Posts

11-29-2009

Germany

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Re: G550 fan problem

2010-04-08, 11:46 AM

@HRP

 

I think your suggestion is great.
I hope that it is feasible.

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1 Posts

04-08-2010

Australia

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  • Message 528 of 588

Re: G550 fan problem

2010-04-08, 12:52 PM

I just want to thank everyone who has pointed out the fan problem and proven the lack of dedication lenovo has to fixing the problem.

i was literally minutes away from buying this laptop when i stumbled across this forum. thankyou for saving me from a massive headache!!

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21 Posts

12-29-2009

Slovakia

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Re: G550 fan problem

2010-04-22, 16:46 PM

Cool air is heavier than hot air, so the hot air has the tendency to move up. So it's logical that most of the notebooks suck the air from the bottom. And also, where at the top would you place fan opening? Engineers know why they do things the way they actually do.

 

Other thing, that one about heat moving from CPU to GPU and then to cooler: The problem is, the G550 is relatively small notebook, so it has place just for one heatsink (where would you place the other?). So, both of the chips (or there are three to be exact - CPU, GPU and motherboard chipset), are cooled down by one heatsink with one fan. So, just one heatpipe is used. Adding another heatpipe just fur GPU wouldn't help (there'll be difference only by few °C due to better heat conductivity)

 

And finally the third thing. G550 hasn't got just two or three speed steps, there are actually about 5 of them, so quarter speed would be higher than the lowest speed actually used (I mean speed when the fan is rotating, not when it's stopped). But, I agree that another speed step should be added, or do it like Asus notebook have (smooth speed regulation, no stepping)

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70 Posts

03-30-2010

UK

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Re: G550 fan problem

2010-04-22, 16:52 PM

True but they could of made to heat pipes so that CPU and GPU heat was moved sperately. as it stands on my model with the 210M heat goes from CPU -> GPU 1 -> GPU(x4500 disabled for some reason bios update could have that come on in light load) -> Fan block.

 

It should really of been on heat pip CPU -> Fan Block  <-GPU 2 <- GPU1.

 

That way the CPU or graphics card is not going to heat up to much.

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