Re: OFF-TOPIC Intel CPU dies...
Geert Uytterhoeven (Geert.Uytterhoeven@cs.kuleuven.ac.be)
Sat, 19 Jul 1997 15:34:16 +0200 (MET DST)
On Fri, 18 Jul 1997, Rogier Wolff wrote:
> Someone who was quoted wrote:
>
> > You didn't do the experiment I suggested:
> >
> > Run a 200MHz-rated CPU at 75/100MHz, and a 75/100MHz-rated CPU at 200MHz.
>
> I think Intel chips are speced for 50-100% of their rated speed.
> i.e. you're allowed to run a 200MHz CPU at 100MHz if you want too.
>
> On the other hand, they will NOT blow up at lower speeds. Clock
> multiplying may become unreliable at lower speeds, but at a multiplier
> of 1, that too should be OK.
But most CPUs are not `static designs'. This means that the internal registers
and memory need a sufficiently high clock to refresh their contents, cfr.
refresh cycles on DRAM.
If your CPU is a static design, you can run it from 0 -- max clock speed. This
is mainly used in CPUs for embedded applications.
Greetings,
Geert
--
Geert Uytterhoeven Geert.Uytterhoeven@cs.kuleuven.ac.be
Wavelets, Linux/m68k on Amiga http://www.cs.kuleuven.ac.be/~geert/
Department of Computer Science -- Katholieke Universiteit Leuven -- Belgium