Originally Posted by her34
does celeron m vs pentium m make a difference for dvd playback?
given two otherwise equal systems, how much more time would the pentium-m get? 2 hours vs 3 hours?
This does not only depend on the processor but also on the DVD-Drive, display and display-brightness.
Also the used software makes a huge difference, like using notebook hardware control do control your speedsteps and voltages.
On my Dell Inspiron 6000 the 1,4GHz Celeron needed much more power when playing dvd than my overclocked 2.23GHz P-M in the same machine.
The cause for that is that DVD-Playback is no problem for P-M or Celeron-M and the P-M is almost all time on lowest speedstep (being 800 on a 533FSB cpu) and for me @0.7V , while the Celeron-M has no speedstep and almost all the time runs at full speed at full voltage using almost full power during dvd-playback.
As the power used for the backlight of the display can take up to half of the power your lappy uses it now really depends on that part how much you gain from switching from celeron-m to p-m.
I for my part will never ever again go for celeron-m if I am not about to exchange it directly after buying it