Nope! Another urban myth about supposedly proprietary parts!!! The colors of
the wires make no difference at all. The manufacturer chooses the wire colors,
and they DO match certain voltages, but there is NO industry standard for the
color of power supply wire leads. Next thing you know, sombody will say that a
beige DVD writer is functionally different than a black one.

According to the HPaq wb site, the system uses a standard form factor microATX
motherboard. This uses a standard ATX12v power supply with a 20-pin ATX
connector and a second 4-pin 12v connector to the motherboard. The main thing
here is to match up the pattern of the screw hole. IIRC, there is nothing
unusual about the size and shape of the PSUs used in P4 Presarios.

The OP needs to be careful only because many newer aftermarket power supplies
have the newer 24-pin motherboard connectors. However, many of them allow you
to separate 4 pins which are left unconnected and to then use the older 20-pin
connector. Other aftermarket power supplies are also made for dual 20- or
24-pin use, with a distinctly separate 20- and 4- pin connectors, which go
side-by-side if the motherboard is a newer one.

Finally, the OP needs to keep in mind that the AGP port is rated at 4x, not 8x.
An AGP card designed for 8x operation will work OK in a 4x AGP slot, but not at
8x speeds... Ben Myers

On Sun, 27 Jan 2008 08:21:14 -0500, "Russ" wrote:

You need to find a compaq type supply!The colors will match the original
supply exactly or no go.
"Rich Bunevitch" wrote in message
.. .
Hi,

A friend of mine wants to replace the 235W power supply in his Compaq
Presario 5330US so he can upgrade the video card to play the latest
games. I took an Antec Earthwatts 380W ATX12V, V2.2 supply to his
house last night but was reluctant to install it after removing the 24
pin P/S connector from the motherboard.

Although both connectors appear to be physically identical, a few of
the wires were different colors (+3.3V?) and each connector has 1 wire
not connected, but they were different wires. The Antec is missing the
-5V line. I can't remember which wire was missing on the original P/S
but it was on the other side of the connector so I think it was either
the Power Good or +5V Standby line.

I didn't remove the original P/S from the case so I'm not sure if the
physical dimensions of the supplies match, either.

I would appreciate it if anyone can tell me if I can safely replace
the existing P/S with the Antec and not have to worry about the system
going up in smoke when its powered on.