Iam just using a 250 watt power supply to try to get an Xp 2000 system
running and it powers up but thats about it not a beep ?

The PSU i think is 2.01 but is 250 watt would this stop the PC from
working all i have is the cpu fan, vidcard no other fans connected ?


Will try a 300 watt one to see if that works.

Thanks if you can help.

We Live for the One we Die for the One wrote:
> Iam just using a 250 watt power supply to try to get an Xp 2000 system
> running and it powers up but thats about it not a beep ?
>
> The PSU i think is 2.01 but is 250 watt would this stop the PC from
> working all i have is the cpu fan, vidcard no other fans connected ?

You already know the answer... 250W is not enough, now did you really have
to crosspost to so many groups?

> Will try a 300 watt one to see if that works.


Get a grip... 300W is not exactly a lot either. Get a decent 350W at a bare
minimum, or a cheapo 550W.

Of course, it would help if you had described the rest of your system.

Ben
--
A7N8X FAQ: www.ben.pope.name/a7n8x_faq.html
Questions by email will likely be ignored, please use the newsgroups.
I'm not just a number. To many, I'm known as a String...

So an Xp 2000 willnever ever run on a 250 watt psu ?


On Sat, 29 May 2004 23:02:54 +0100, "Ben Pope" <(E-Mail Removed)>
wrote:

>We Live for the One we Die for the One wrote:
>> Iam just using a 250 watt power supply to try to get an Xp 2000 system
>> running and it powers up but thats about it not a beep ?
>>
>> The PSU i think is 2.01 but is 250 watt would this stop the PC from
>> working all i have is the cpu fan, vidcard no other fans connected ?
>
>You already know the answer... 250W is not enough, now did you really have
>to crosspost to so many groups?
>
>> Will try a 300 watt one to see if that works.
>
>
>Get a grip... 300W is not exactly a lot either. Get a decent 350W at a bare
>minimum, or a cheapo 550W.
>
>Of course, it would help if you had described the rest of your system.
>
>Ben

In article <(E-Mail Removed)>, We Live for
the One we Die for the One <Mr (E-Mail Removed)> says...
>
> So an Xp 2000 willnever ever run on a 250 watt psu ?
>
Pretty much. You'll need a bloody good branded one and you won't be
able to run much kit on it.



--
Conor

I started with nothing and I still have most of it left.

"We Live for the One we Die for the One" <Mr (E-Mail Removed)> wrote in
message news:(E-Mail Removed)...
>
> So an Xp 2000 willnever ever run on a 250 watt psu ?
>
>
> On Sat, 29 May 2004 23:02:54 +0100, "Ben Pope" <(E-Mail Removed)>
> wrote:
>
> >We Live for the One we Die for the One wrote:
> >> Iam just using a 250 watt power supply to try to get an Xp 2000 system
> >> running and it powers up but thats about it not a beep ?
> >>
> >> The PSU i think is 2.01 but is 250 watt would this stop the PC from
> >> working all i have is the cpu fan, vidcard no other fans connected ?
> >
> >You already know the answer... 250W is not enough, now did you really
have
> >to crosspost to so many groups?
> >
> >> Will try a 300 watt one to see if that works.
> >
> >
> >Get a grip... 300W is not exactly a lot either. Get a decent 350W at a
bare
> >minimum, or a cheapo 550W.
> >
> >Of course, it would help if you had described the rest of your system.
> >
> >Ben
>

Actually that 250watt psu should be able to power your system to the post
screen at least, unless somethings defective

In article <(E-Mail Removed)>,
(E-Mail Removed) wrote:

> Iam just using a 250 watt power supply to try to get an Xp 2000 system
> running and it powers up but thats about it not a beep ?
>
> The PSU i think is 2.01 but is 250 watt would this stop the PC from
> working all i have is the cpu fan, vidcard no other fans connected ?
>
>
> Will try a 300 watt one to see if that works.
>
> Thanks if you can help.

From this table, a Thoroughbred Model 8 (CPUID 681) uses 1.6V
and draws 55.7W.

http://www.qdi.nl/support/CPUQDISocketA.htm

Assuming the CPU is powered from the +5V supply (no 2x2 ATX 12V
connector), and assuming 80% Vcore conversion efficiency, then
this is the amount of current needed from the supply.

55.7W/1.6V ==> 34.8A, 34.8*(1.6/5.0)*(1/0.80) = 13.9 amps

A high end video card needs 5V@10A and 12V@2A according to some
reports. The ATI9800pro I have here draws 5V@5.5A and 12V@0.9A
doing 3DMark2001se.

Let us take the two pessimistic numbers 13.9A and 10A, this is
a total of 23.9A for a processor and video card. Now, here is
a 250W ATX from pcpowerandcooling:

http://www.pcpowerandcooling.com/pro...x_econ_atx.htm

+5V @ 25A
+12V @ 10A
-5V @ 0.3A
-12V @ 0.5A
+3.3V @ 13A
+5VSB @ 2A
+5V & +3.3V<150W

The +5 is pretty tight, if you take the worst numbers. Some +5V
may be needed for some other stuff on the motherboard, like
power conversion for the DIMMs perhaps (5 watts each estimated).
A lesser video card, or using the numbers I measured on my video
card, makes it look a bit better.

The +12V would be say 1 or 2 amps for the video card (like an
FX5900 or ATI9800), 1 amp for fans, 1 amp for a couple of idling
disk drives, and is no where near the 10A limit.

Note that this power supply would not be sufficient for just
any old Pentium 4, as the Pentium 4's usually use +12V for
processor Vcore conversion, and 12V@15A would be a more confortable
number than !2V@10A for the fastest Pentiums.

So, you have to be pretty lucky to find a 250W supply that puts
the current where it is needed. It is a situation where I would
want to power the system in question with an oversized power
supply first, measure the current drawn on the various power
rails, then go shopping for a 250W supply that matches the
requirements.

If that computer had an FX5200 or ATI9000 in it, that 250W supply
would have no problem at all with an Athlon.

Paul