Computerring123
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Raspberry fan needed?

Tue Dec 22, 2015 1:57 am

Do i really need fan for raspberry if i overclock raspberry?
does it matter if i dont have

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Douglas6
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Re: Raspberry fan needed?

Tue Dec 22, 2015 2:11 am

Short answer: no.
Longer answer: nope.

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jjex22
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Re: Raspberry fan needed?

Tue Dec 22, 2015 2:38 am

As Douglas says nope.

Sorry if this question is because of my mentioning of fans on your other thread?

I only used a fan because it gets very, very warm here and my Pi server lives in a box, always on (when we go away, we lock up the place and shut off the AC; We've come home before to electronics that have tripped their internal heat cut offs, so I don't take the risk). Even in this usage case, it is very unlikely to actually need the fan (the fan I use is one of those cheap things that come inside those cooling pads people put under laptops), it's just a precaution.

As I said, when I tested those early model Pi B's, I ran them as they come out the box, at 1Ghz, at temps over 40C for days and they were fine.

Pi's are hardy little things. :)

I doubt many people need a fan at all, but it's always good to watch temps; if you live in the UAE and want to put a Pi in a tin box outside all day, maybe factor in the heat, however if you will be using your pi in your house, and you're not suffering the heat, your Pi should be fine too :D
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jahboater
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Re: Raspberry fan needed?

Tue Dec 22, 2015 8:26 am

Do I really need fan for raspberry if I overclock raspberry?
does it matter if I don't have
The chip (SoC) is similar to those used in mobile phones - think of it placed in a tiny unventilated case and that case then put in someone’s pocket. The Pi is very robust and you will not damage it easily.

Having said that, I recently overclocked one of my Pi2's and additional cooling made a world of difference. I tried four Pi2's and found one only that was stable at the target settings, and that was marginal - needing PVT disabled for the sdram. The Pi's would crash or report errors in memtester after a couple of hours of stress testing when the temperature rose towards 70C.

Code: Select all

disable_pvt=1
over_voltage=6
over_voltage_sdram=6
Adding small stick on heatsinks (from PiHut £1) lowered the temperature a few degrees which meant that I could reduce the overvoltage - which itself dropped the temperature another few degrees. Its now rock stable at:-

Code: Select all

over_voltage=2
over_voltage_sdram=2
I wouldn't use a fan - noisy and possibly unreliable.

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RaTTuS
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Re: Raspberry fan needed?

Tue Dec 22, 2015 8:48 am

no and no
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DougieLawson
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Re: Raspberry fan needed?

Tue Dec 22, 2015 10:57 am

Douglas6 wrote:Short answer: no.
Longer answer: nope.
Even longer answer: never.
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Re: Raspberry fan needed?

Tue Dec 22, 2015 11:23 am

DougieLawson wrote:
Douglas6 wrote:Short answer: no.
Longer answer: nope.
Even longer answer: never.
NO! Don't get Dougie started - he would only have 17547 posts if peeps didn't ask this question regularly :D

Texy
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Heater
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Re: Raspberry fan needed?

Tue Dec 22, 2015 12:41 pm

I'm a Raspberry Pi fan.

I'm here if anyone needs me :)
Memory in C++ is a leaky abstraction .

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davidcoton
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Re: Raspberry fan needed?

Tue Dec 22, 2015 2:09 pm

Heater wrote:I'm a Raspberry Pi fan.

I'm here if anyone needs me :)
A Fan Heater?
Signature retired

Heater
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Re: Raspberry fan needed?

Tue Dec 22, 2015 2:15 pm

I also do cooling when connected in reverse.
Memory in C++ is a leaky abstraction .

Chloe45
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Re: Raspberry fan needed?

Tue Dec 22, 2015 2:53 pm

im a big fan of raspberrys

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