Re: Overclock the N900?
 

n then overclock it to 900mhz... see how it disipates heat from each n every corner

Re: Overclock the N900?
 

Back to original post.
I wonder who the 11 members are, who said it was impossible and will they put their hands up now :)

Re: Overclock the N900?
 

Javispedro has some valid arguments I must admit :) Anyway, how long do you estimate overclocked N900 to work being moderately used?

Re: Overclock the N900?
 

Come on boys, they're only making smoke, just because today is monday, and PR1.2 is still "coming soon"

Re: Overclock the N900?
 

everyone knows it decreases the lifespan of the phone. if ur worried abt urs, then plz do so.. the overclocking is NOT mandatory for everyone..

if U dnt understand who U and ULL are, ask someone.. IM NT ERE 2 TEACH U

Re: Overclock the N900?
 

What language was that?:rolleyes:

Re: Overclock the N900?
 

tht waz inglees

Re: Overclock the N900?
 

The poll is not from the original post, but from a thread merged by a moderator.

Re: Overclock the N900?
 

Perhaps a better way would be to have two arrays of data (clock cycles and temperature). The point on the curve that has a significant spike (no longer linear) is the point most likely where the operational ceiling of the chipset is.

The Droid uses the 3430 chipset and most tests suggest that once you pass 1.1 ghz, the temps spike by up to ten degrees and apps begin to freeze. There are very few reports of issues at 900mhz to 1ghz and virtually no issues at 800mhz.

But as Flandry already mentioned, the design for heat dissipation is a caveat when comparing the Droid and N900.

Re: Overclock the N900?
 

The answer to that is way beyond anybody here. It would require a model of the CPU and take operating temperatures, material properties, and voltage as inputs.

What we do have is the manufacturer's specifications for a similar processor as quoted a couple pages back.

I think anyone considering overclocking/volting any device should read about electromigration. I learned about it in class but the wikipedia article is really pretty good. See in particular this section: http://en.wikipedia.org/wiki/Electro...7s_equation.29

Note the exponential dependence on temperature and the (approximately) inverse square dependence on current density. You can make rough estimates as to how much raising CPU operational temperature will accelerate the process, and maybe make a rough guess as to the relative effects at different operating voltages based on the manufacturer stated lifetimes, but (1) this is only one mode of failure (2) doesn't capture the exact defects of your particular device edit: and (3) you can't really get at accurate on-chip temperature information, anyway.

So in other words, any estimate here would be only of academic interest.

Two different issues though, really. There's the immediate ability of the chip to run at a given frequency/voltage, and the lifespan of the chip. Running at elevated frequency/voltage/temperature reduces the lifespan of the chip (approximately) with the inverse square of current and exponentially with temperature. It's not linear at all. So while there is a linear scaling for temperature within a given range of frequencies, there's an exponential decline in lifetime.

Anyway, as i said, it's mostly a point of academic interest and not really of much value to this thread because those who buy a new $600 phone every six months (shocking statistic there from Javier) don't care, and those who do care are just not going to go crazy with the overclocking. :D