Re: Overclocking [was: iNav causing hard reset - SOLVED]

According to this:

http://www.overclockers.com/tips30/

power (and therefore heat) increases linearly with frequency, and with
the square of the voltage.

So a CPU operating at 150% of rated speed (but same voltage) produces
1.5 times as much heat.

A CPU operating at 150% of rated voltage (if that's possible) produces
2.25 times as much heat.

--Dave

Joe Pluta wrote:

Peter Dow (ML) wrote:

Hi Joe,

I take exception to your statement that "There's nothing about changing
the bus frequency to a number greater than that printed on the chip's
box that causes bad things to happen to the chip." Running chips at
higher frequencies means they're going to generate more heat, and more
heat is definitely detrimental to them, hence all the thermal sensors.
How much you overclock and how good your fans and heat sinks are will go
a long way towards determining if you're going to have a problem. Add
one of those liquid cooling systems if you're going to bump it up a
significant amount.

While I agree that cooling is important, it's wrong to say that
overclocking is in any way detrimental in and of itself, or that it
requires any special cooling equipment. What cooling you need depends
entirely on the chip and the box and the fan and any number of issues,
and you can easily overheat a computer just by putting in too much
memory or too fast of a disk drive.

That's why I mentioned that my E2180, running at 150% of rated speed, is
doing fine at 85 degrees with stock cooling. It really depends on a lot
more than just the CPU speed. And this is especially important:
overclocking by frequency alone will SLIGHTLY increase heat, but not
nearly so much as if you apply extra voltage. I'm pretty comfortable
saying that bumping up speed by frequency alone will not require much,
if any, more cooling than running at rated speed. It's the voltage
increases that kill you (and shorten the life of your CPU considerably).

Joe