Re: [9fans] Raspberry Pi 2 Model B

[Bakul Shah <bakul@bitblocks.com>]

On Sat, 07 Feb 2015 18:48:28 PST erik quanstrom <quanstro@quanstro.net> wrote:
> On Sat Feb  7 18:18:29 PST 2015, bakul@bitblocks.com wrote:
> > On Sun, 08 Feb 2015 02:10:25 +0100 hiro <23hiro@gmail.com> wrote:
> > > Do the RPI2s break very fast or why is the warranty such an issue?
> >
> > A chip's rated clock rate is typically much lower that the max
> > freq it at which it can run stably -- and there is fair bit of
> > variation in this max freq.  A rare few 2836s can even run at
> > double the default frequency.  But as a side effect of
> > speeding it up and/or increasing internal voltage it will also
> > run much hotter & if you don't use a heat sink, it is likely
> > to fail much sooner.  They catch such use by setting an
> > irreversible bit inside the chip. RPF's warranty is valid only
> > if you left these parameters at their default value or changed
> > them as per their instructions (used raspi-config under linux
> > or use the setting n config.txt as per what raspi-config
> > does).
>
> i believe the gp understood this issue, but guessed that there
> was little chance of breaking this particular chip with this particular
> clock speed, so it doesn't much matter if the warranty is void.

Who's gp?

> On Sat Feb  7 18:32:31 PST 2015, khm@sciops.net wrote:
>
> > Apparently you can crash one with a light bulb:
> > http://www.raspberrypi.org/forums/viewtopic.php?f=28&t=99042
>
> crash, not broke.  and the light sensitive chip was located at iirc
> u16.

Freeze, not crash. All semiconductors are photosensitive. In
highschool I made my first photosensor by cutting off part of
a transistor metal can and removing all the white goop in it!