Re: [gentoo-user] Re: Suspend to RAM caused crashes

[Volker Armin Hemmann]

Am Sonntag 21 August 2011, 19:26:47 schrieb Nikos Chantziaras:
> On 08/21/2011 07:08 PM, Mark Knecht wrote:
> > On Sun, Aug 21, 2011 at 8:43 AM, Nikos Chantziaras<realnc@×××××.de>
wrote:
> >> On 08/21/2011 06:33 PM, Mark Knecht wrote:
> >>> On Sun, Aug 21, 2011 at 8:12 AM, Nikos Chantziaras<realnc@×××××.de>
> >>>
> >>>   wrote:
> >>>> On 08/21/2011 02:19 PM, Francesco Talamona wrote:
> >>  [...]
> >>
> >> The RAM gets hot when there's RAM load (meaning being used heavily),
> >> not
> >> when there's CPU load :*)
> >
> > Do you feel heat when your PC is turned on and running hard? Of course
> > you do. The whole machine heats up. The CPU under load heats the
> > machine so the RAM and drives and everything else heats up also. Not
> > as hot as the CPU, but it heats up. So I might agree with you - the
> > RAM might not be 'hot', but it would certainly be 'warmer'.
> >
> > I'm not suggesting that this would cause a normal DRAM stick to go
> > bad, but only that if he had a very marginal bit of RAM that it might
> > go out of spec...
>
> On a laptop maybe.  On a desktop, the air around the RAM modules get
> maybe 1 degree C warmer (I know because I have temp sensor there,
> connected to the front panel).

me too - and the direction of air flow from the cpu cooler plus the warmth of 
the air can change the temperature of the ram sticks by 5°C. So...

No, not 'laptop maybe'.

>
> When it does get warm is when there's GPU and disk load.  Those suckers
> combined can raise the temp inside the box by 5-6 degrees.

those can raise it even more.

>
> The meaning of all this is that if memtest can't find any errors after a
> full run (which can take an hour), the chances of getting an > error that
> is really related to RAM under CPU stress are very slim.

a full run is more than 24h. Everything shorter is only of worth if you 
already hit errors after a few minutes.

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