300 watt power supplies dont supply 300 watts to the 5volt rail which i
believe supplies the pci/agp motherboard etc. an amd athalon + a modern gfx
card + a few pci devices a cd burner dvd etc 7200 spin hard drive (quite a
common rig these days) will overwork a usual 300watt power supply. and some
people have 250 watts in their rigs along with random crashes - then they
add the modem...... have a look at the voltages supplied by most psus and
note that 5volts is usually more like 4.7 and plot them and go and play
unreal 2k3 and have alook how far it goes down (on massively
underpowered/overclocked systems you can usally note that where the game
quits out to the desktop is where the voltages went down to the lowest point
everything could stay stable at).

also not many people have touched on it here - but with overclocking
becoming commonplace these days front side bus / pci divider issues prolly
need to be looked at - its usually agian the pci network adapters that
suffer first.

of course interference helps as well.....

Aaron

> > BTW, I am told that he main problems with Internal modems is that fact
> that
> > they draw their power source from the already overloads PSU in your
> > computer, rather than having a seperate power source. This causes
problems
> > both when far away from an exchange, plus when you are too close to an
> > exchange.
>
> PSU? overloaded? Psaw! I don't think it's a lack of power at all that
causes
> internal modems to be less reliable, it's more that they are sitting in a
> large metal box, sharing power with several other devices, and absorbing
> electrical interference from them, as opposed to being in their own case
> with their own power source..
>
> Steve
>
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