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Conections I want to place my old compaq Presario Motherboard (which is a Asustek mod. Salmon v.1.40 into my old Dell computer, I have the power supply and hard disk for the board, can it be done and what are the power connections.

Answers :

To reiterate a solution already given.

WATCH the Dell power supply! Dell, and other computer manufacturers had Proprietary parts in their computers, in the past. They changed the wires around in the 20/24-pin ATX motherboard connector.

Proprietary means they wanted THEIR parts, used in THEIR computers.

Color codes are standard though.
1.Orange is 3.3 volts
2.Red is 5 volts
3.Yellow is 12 volts
4.Black is Always a Ground wire
5.Green is the Soft Power On wire

Look closely and see if they match up to the Compaq motherboard, IF, you are using the Dell's PSU. (Power Supply Unit)

If they Don't, you WILL fry out the Motherboard, possibly the Processor, Ram Memory, and Graphics Card, (If used)

How to know?
Do you have the PSU used with the Compaq? Match the color code of the wires, to the ones used by the Dell. Look to make sure the color of the insulation of the wires, goes down in the same socket holes, as the Compaq 20/24-pin ATX motherboard connector uses.

Here is more information on what the correct color code, to placement of wires, in the 20/24-pin ATX motherboard connector should look like,


Computer cases Do vary!
If both computers have an ATX form factor motherboard, or if one of them has a Micro-ATX form factor motherboard, they can be swapped.
The I/O Shield may be different though.

(I/O stands for Input/Output. The I/O Shield is the thin piece of rectangular, shiny metal, at the back of the desktop computer. The Keyboard, and Mouse are usually plugged into this area. A Keyboard, and a Mouse are Input)

Hopefully your Dell doesn't use a BTX form factor motherboard. The I/O devices plug into a different side, than used on the ATX form factor. Sometimes the PSU is placed at the bottom of the computer case, instead of the top.
Compaq its a company soooo spiky about her hardware, like see trying to fit in a dell case its a pain! (also in stantar case's) you can take out the original power suply from compaq and try to fit in Dell case, its no to b nice but works.
Other ways:
cut the wires in original power suply (just the diferents not found in Dell) use a multimeter to known vltage before you connet something, and be very carefull about shortcuts.
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