cpu for mobiles without fan, how it's possible?
 

how cool cpu of our N900 (and others mobile devices like it) without a fan?
:confused:

Re: cpu for mobiles without fan, how it's possible?
 

Very cool compared to desktop/laptop ones... That's what makes ARM superior in the mobile world.

Re: cpu for mobiles without fan, how it's possible?
 

Heat Sink ?

Re: cpu for mobiles without fan, how it's possible?
 

the freezer (portable one)

Re: cpu for mobiles without fan, how it's possible?
 

They use less energy when running, so they don't get as hot, if they don't get hot, they don't need active cooling.

Re: cpu for mobiles without fan, how it's possible?
 

???
inside N900?? really?

Re: cpu for mobiles without fan, how it's possible?
 

i just checked the arm cortex a15 processors. We do need one of these!

Re: cpu for mobiles without fan, how it's possible?
 

water cooling perhaps?

Re: cpu for mobiles without fan, how it's possible?
 

what about powerful GPUs with passive cooling?

it is all about the area, and area of heatsinks outer core when being more specific. and there are several limiting factors such as air gap (heatsink flanges cannot be microscopic because certain air gap must be reached in order to archieve the best possible heat transfer etc etc etc)

and it of course depends fully on heat dispatch of a processor. more mobile processor = less heat dispatch.

Re: cpu for mobiles without fan, how it's possible?
 

Also ARM is a very low power CPU (electrical power not processing power), one of the the most efficient processors around IIRC
ARM processors are low voltage, ultra low voltage etc., all designed to keep power and therefore heat down.

Think of the ARM CPU as an energy saving lightbulb, its a bit like a 15W bulb that's equivalent to a standard 100W lightbulb.

Re: cpu for mobiles without fan, how it's possible?
 

i jus throw my cellphone in water to cool it down
perhaps u should try that too maemo.tit

Re: cpu for mobiles without fan, how it's possible?
 

For some weeks ago I bought an HP mini. Dumbest thing I ever have done :-(

First I did was to get rid of windows 7 and install Meego weekly build on it. But the fan sounded like a JETplan first I thougt it was related to kernel power module not working in Meego or similar but after read some threads on some forums on internet I realised it "normal" on this laptop :-(

I really is one of them that is SO SICK if X86 platform. Now when Arm getting better it hopefully means we can have ARM on more platforms than just small embedded devices.

Hopefully we will see more ARM:s on netbooks/touch HW:s.

I really hope Intel fails with X86 platform on embedded platform cause I doont belive they hjave a chance to vcompete with ARM in case of powerconsumtion.

Re: cpu for mobiles without fan, how it's possible?
 

It means we can get more powerfull cpu in future if a small fan is added!!!!!!!!

Re: cpu for mobiles without fan, how it's possible?
 

The fan is also a sign of heat (=power consumption)

Mobile devices have to be economic on power consumption.
Therefore CPU's with fans have to be avoided.
(and also for the noise.)

There is also another way how you can keep heat away:
A metal box that spreads heat.

I don't think that mobile devices need more power than the n900.
The future has to be that more and more calculations are done on big fixed stations linked by internet.

Google is right.

Re: cpu for mobiles without fan, how it's possible?
 

i really wouldn't say that mobile devices shouldn't be more powerfull then our n900.
many things are laggy and need some time to become smooth,like flash video etc.
i'm really happy that dual core cpus for mobile devices are coming ;)

Re: cpu for mobiles without fan, how it's possible?
 

And there are things like pushing 1080 out of HDMI, 1080 video recording and things like that that the OMAP3430 can't do.

And as the power consumption seem to be great on the first dual core shipping, tegra 2 so i got nothing against them.

Re: cpu for mobiles without fan, how it's possible?
 

Just like 640k was enough for everyone. : ) (Okay, it's a myth, billy g didn't say that)

Google might be right for you, but it's wrong for me. I value my privacy. Software will always expand to fill the available processing power, and then some, so these devices will always require better and more power efficient performance.

Re: cpu for mobiles without fan, how it's possible?
 

(OT)
I value my privacy too. and as I know google has problem to respect privacy, can you advice me a free host domain that respect my privacy to register my new email? (i prefer, if it exists, in opensource/linux/community. eg: myname@linux.org or myname@fsf.org or myname@ubuntu.com...)
thank you very much!!
(/OT)

Re: cpu for mobiles without fan, how it's possible?
 

IBM thought that the whole wide world would only need about 5 computers (or is that another myth?).

Re: cpu for mobiles without fan, how it's possible?
 

I wouldn't be satisfied even if i could run full scale simulations of cosmic dynamics from the Big Bang to modern times while playing Crisis, downloading a rental store worth of DVD torrents, transcoding a double digits megapixel resolution video and had a post-singularity level AI.

Re: cpu for mobiles without fan, how it's possible?
 

That's not enough. I say computer will have peaked when they are capable of simulating the entire universe with everything in it, life and high level intelligences; like the matrix but on an universal scale.

Re: cpu for mobiles without fan, how it's possible?
 

Then the computer would need to simulate itself? :confused:

Re: cpu for mobiles without fan, how it's possible?
 

I wait for the computer that can give me the answer of 42.

slaapliedje

Re: cpu for mobiles without fan, how it's possible?
 

According to various articles I've read:

1. Intel et al went after horsepower, damned be the heat dissipation!
2. While this was going on, ARM quietly went after the low power segment. A processor from the other guys will do more per cycle but will expend exponentially more energy to do it.
3. MIPS and maybe a 2 or 3 other companies tried to make different processors for both...and we see (or rather don't) where they are these days.

Intel is trying to play catch-up with the Atom line, but they have a long way to go, even now. Also, ARM doesn't make chips: they've always been a fabless house. They also went for integration when it was just an afterthought of everyone else (or not thought of at all): hence why we see them everywhere in the mobile field now whereas everyone else has been left in the dust. There's some stuff from both Intel and AMD on the horizon, but whether it'll compete with current and near-future offerings from ARM and those they've been working with remains to be seen.

Also, don't forget the hidden (not normally seen by the user) advantages like an instruction set that can't execute x86-based viruses and trojans like winblows. :)

The down side, sometimes seen by users, is that nothing is "standard", not even the boot sequence: thus the fragmentation of Android isn't just in the OS but even at the hardware level. If Intel and AMD play their cards right, they can capitalize on this big time when they start catching up in the critical areas (mips/flops per watt, TDP, etc).

Oh, and one more thing: remember, you need to calculate total power dissipation for EVERYTHING on board: on the N900's OMAP3430, that is not just the ARM but also the PowerVR GPU AND the cell phone modem DSP *ALL ON ONE DIE*. Thus, if you overclock (or the heat sink connection fails) and you kill that chip, you have killed everything!

Mike

P.S. Note most of the people on TMO know all this, but since this is a n00b thread, I thought making it clear would help.