low power cpu compatablity. Edit: Undervolting/clocking?

[drag]

How compatable are low-power proccessors to their desktop counterparts?

Like you have the Pentium III mobile, and the socket 370 Celeron mobiles. Would either of those be able to be used in their desktop counter part's place?

How about the Pentium 4-m, is that compatable with the Pentium 4 desktop?

Would it make a difference if I was able to adjust the voltage?

What about the mobile k6/k7 AMD's?

 

[n0cmonkey]

Mobile bartons seem to work just fine in desktops. Plenty of people here are using them as good over clockers.

 

[drag]

How about undervolting?

Has anybody ever undervolting/clocked Pentium 4-style proccessors?

Like take a 1.4 celeron down to 700mhz and some low voltage like 1.1?

 

[MercenaryForHire]

Originally posted by: drag
How about undervolting?

Has anybody ever undervolting/clocked Pentium 4-style proccessors?

Like take a 1.4 celeron down to 700mhz and some low voltage like 1.1?

You'd have to do it purely on FSB, as Intel processors won't allow you to change the multipliers.

I've noticed you've mentioned only power draw, and not the usual reason for downclocking - heat. Trying to "save the rainforests" or do you have a plausible reason?

- M4H

 

[drag]

Originally posted by: MercenaryForHire

Originally posted by: drag
How about undervolting?

Has anybody ever undervolting/clocked Pentium 4-style proccessors?

Like take a 1.4 celeron down to 700mhz and some low voltage like 1.1?

You'd have to do it purely on FSB, as Intel processors won't allow you to change the multipliers.

I've noticed you've mentioned only power draw, and not the usual reason for downclocking - heat. Trying to "save the rainforests" or do you have a plausible reason?

- M4H

I want a mobile computer, but I want to build it myself.

I am looking at single board computers, but the ones made for using most mobile proccessors are incredably expensive.

Obvious answer would be a VIA-based Mini ITX with a Eden proccessor, but those are just a bit too slow. Plus their wattage isn't incredably low either. They are running about 25-35 watts with power conservative parts.

My goal is going to get a computer that will run 8-10 hours on a battery charge, in order to do that with the Mini-itx boards I would have to carry around 2-3 pounds of batteries.

I figure to get what I want the system is going to have to run a max of 20 watts. Maybe 25 watts. (Minus the display.)

So SBC boards are used commonly in embedded platforms and heat is usually a big problem. So they are designed more efficiently (I am hoping).

A mobile althon or Intel consumes as much wattage as a VIA cpu anyways. I am thinking that if I can take a celeron, drop the voltage down to 1.1 from 1.5 and half the mhz then that may do the trick.

If anything it will give me the same energy consumption as a VIA-Eden based mini-itx board, hopefully less, but with much better performance...

Right now I am just trying to evaluate my choices.