1.2 Tualitan- how many volts is too many? - Page 2

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Re: 1.2 Tualitan- how many volts is too many?

Thanks David..

Actually, this PC is a Compaq- it's coming up on 5 years old.  I've taken it
about as far as it can go...

I was thinking of boosting speed a little by upping the voltage (per
Fishface) but as it is, it is very stable, unless I keep it running without
(It's in my office, a converted attic- Without the AC on, the attic probably
hits 110/120F!  PLUS if I forget to keep the desk cabinet open that it's

My first idea was to replace the power supply since, per the part number,
it's only 145 watts (how can that be?).  I was going to take the 230w
Powerman from my daughter's Intel (being replaced with a 380), and use it.

BUT, I am not sure of 2 things- first, how can the Compaq p/s be only 145w?
Second, is it a standard ATX p/s?

The board, btw, is a Mitac 6513wu, with Compaq's part number 191767. The p/s
is Compaq p/n 124848.

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Re: 1.2 Tualitan- how many volts is too many?

Uncle Vinnie wrote:

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That would do it. Especially the closed desk turning it onto a mini oven
from lack of airflow, and being just about already there starting at 120F.

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Because it's sized for 'what it needs' rather than "whatever you end up
building" as is the case with a generic PSU where they have no idea what
you'll put in there so it has 'more than enough of everything' (for the
'size', e.g. 250 Watts). Or, so one hopes.

That's also why not all generic 250 watt PSUs are the same. They still have
  to make *some* kind of assumptions as to how much power to allocate on
the 3.3, 5, and 12 volt rails so one might provide more to the 5, vs the
others, while another favors the 3.3 and yet another is more generous on
the 12. But they all still 'add up' to 250, assuming they didn't cheat on
the spec like many do. And those assumptions change over time as the
'typical' PC available at the time changes. So the allocations in a PSU
built back 'in the beginning' of the ATX days won't necessarily have the
same power allocation as one made today.

Point being, even a 'million watt' PSU won't help if all that power is on
the wrong power rail for your particular system.

And that's before you even get to things like the noise and regulation specs.

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Most likely a Micro or Flex ATX PSU. In which case, a standard ATX won't fit.

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