Re: PC fan getting very loud

["Alexander V. Makartsev" <avbetev@gmail.com>]

On 09.05.2021 12:49, deloptes wrote:

> Alexander V. Makartsev wrote:
>
> > On 09.05.2021 02:30, deloptes wrote:
> > > Charles Curley wrote:
> > >
> > > > > Fujitsu ESPRIMO Q520 when opening some sh*tty web sitesin firefox the
> > > > > fan gets extremly noisy.
> > > > >             
> > > > I have a similar problem with some of my older laptops. I have switched
> > > > to Vivaldi (based on chromium), and that has reduced the problem
> > > > considerably. Firefox is a resource hog.
> > > >           
> > > Q520 is not a week/old machine it is i5 cpu
> > >
> > >         
> > I think you have unrealistic expectations.
> > This unit has 4th gen 2 core CPU rated at 35W TDP. [1] Which is not as
> > efficient as modern CPUs and don't have the ability to step-down to
> > low-frequency (under 1GHz) modes.
> > Turbo Boost doesn't count in the TDP rating and it makes this mini-PC to
> > generate even more heat.
> > That amount of heat has to be dissipated with super small heatsink and
> > cooling fan. [2]
> > Keep in mind, that fan also has to cool down every other part of this
> > mini-PC, like ICH, RAM, HDD and power circuit components.
> > No wonder it struggles to keep up and produce so much noise.
> > Put this mini-PC under any, not just Firefox, multi-threaded workload
> > and you will have the same outcome.
> >
> >       
> Thank you - I've been thinking of this, but somehow I am not convinced. See
> the CPU frequency (800).
> What would be a good test to find out if this theory is true? Should I test
> by opening the case. If theory is true with proper cooling it wouldn't run
> crazy. Correct?
>     
    You can monitor and log temperatures and other characteristics with
    'psensor'.
    TCase of i5-4570T is only 66.35°C and that means CPU will have to
    keep the temperature at that point or lower.
    I'd expect an idle temperature of this CPU (without any load) with
    this cooling solution will be already around 40-45°C if not higher.
    By simple launching of any application will make the CPU load to
    spike to 100% and heat to build up.
    I'm not sure if disabling CPU vulnerabilities mitigations
    (meltdown\spectre) would improve the performance of the CPU,
    allowing it to go into idle state sooner and this way make it cooler
    without resorting to throttling.
    Opening the case won't help much and will probably be more harmful
    if the cooling solution was designed to make the air flow through
    the case and this way cooldown the other components of this unit.
    I doubt you can do anything to improve cooling efficiency of this
    mini-PC, because its cooling solution is not standard and you can't
    just replace it with a more efficient one, like you can with
    standard PC.
    Basically, a small sized cooler fan means it will have higher RPM
    (3000+) and high RPM means it will produce a lot of loud noise.
    
> C700
>
> vendor_id       : GenuineIntel
> cpu family      : 6
> model           : 42
> model name      : Intel(R) Core(TM) i5-2400 CPU @ 3.10GHz
> stepping        : 7
> microcode       : 0x2f
> cpu MHz         : 1720.697
> cache size      : 6144 KB
>
> Q520
>
> vendor_id       : GenuineIntel
> cpu family      : 6
> model           : 60
> model name      : Intel(R) Core(TM) i5-4570T CPU @ 2.90GHz
> stepping        : 3
> microcode       : 0x28
> cpu MHz         : 800.998
> cache size      : 4096 KB
>     
    
    
-- 
With kindest regards, Alexander.

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