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Name: worldlibrary
Well I believe the new graphics card over taxed the 200w power supply. LOL!
2 cdroms 2 hard drives 1 A drive. 1 scsi card 1 usb2 card 1 new graphics card.
Card works well in another computer.(tested)
Power supply tested bad. (10.00 tester doesn't give voltage but does give good or bad )
What I would like to do is convert one of my p3 power supplys to p4. I can use the old 4 prong plug and wires.
This is to test it out and make sure only the ps went and not the mb ect. Good money after bad ???
Looked on the internet and did find converter adapters that goes into the 4 pin HD plugs, but the pictures are so small I cannot see how ,where, the two black and two yellow plug in.
The voltage is probably different so black to black and yellow to yellow....seems to be a long shot.
Just gave away my last p4 ps a couple of weeks age......kicking myself.....ha!
Any thoughts on which black wire and witch yellow wire goes where would be appreciated.
Confused? I want to run the four hd wires into the motherboard.
Still looking for a bigger picture or scimatic. Can't spell it but can read it.
W.L.
Why risk your hardware? All CPUs prior to the P4 get their power from the +5v rail. Modern systems get the bulk of their power from the +12v rail. An old P3 PSU isn't gonna have enough amperage on the +12v to handle the needs of your setup. Just buy a new PSU. You should be able to find something decent for about $40.
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Yellow wires in standard ATX PS wiring are always +12v; black wires are always common. The wires in the P4 connector are usually the same size as the wires for the larger power connectors. Yes, you can connect yellow to yellow, black to black, but it may be a good idea to not Y the connections 2 to 1.
Check your old PS.
See response 4 in this:
http://www.computing.net/hardware/w...You probably need at least 250 watts PS capacity.
I have been told by pros at a place that builds custom systems all the time you don't ever need more than 350 watts PS capacity if your mboard has no PCI-E slots, unless the computer is a heavily loaded server.Older PSs don't have "rails". All the +12v wires (yellow), all the +5v wires (red), all the +3.3v wires (orange) , all the common wires (black) are often each sourced from one small area on the PS circuit board.
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i have done it before by using the black and yellow wires from spare molex plugs (the harddrive/cd drive power type plugs) on the psu. It worked fine.
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Thank you,
Did find a p3 ps with the same wire colors with the exception of a white wire. The fried ps does not use a white wire as the socket is empty.Thinking of just snipping the white wire off and taping off.
Any thoughts on this.
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The white wire is for a function only ISA slots use. If your mboard has no ISA slots, it isn't used and there is no circuit on the mboard that connects to that position on the 20 position connector. You can leave it as is.
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Super, I am in for a new power supply.
Made up the p3 to p4 test unit and the computer booted up and all is fine.
Test ps wont fit...lol just to big. But at least I know that it is the only hardware thats toast and the rest is fine.
Thank you all.
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Lots of computer cases have PSs that have standard wiring but the box they are in is a mATX or other oddball size.
If you don't mind modifying the case, such as so the PS would stick out the back some, you may be able to get a standard PS/2 sized PS to fit, or you may be able to custom mount it above the mboard.
Or you may be able to remove the internal board from the replacment PS and install it in the old box, possibly having to mount the fan a different way.
Otherwise, there are several variations of sizes of mATX PSs available from major PS makers that may fit (I don't recommend you use generic mATX PSs - they are more likely to fail).
Or you could use a used or get a new cheap generic case (I got one for $20 from a local computer repair place) that a standard PS fits in, and transfer your mboard and all your components to that, but you would have to determine the pinouts for the front panel stuff (power led, power and reset switch, speaker, HD led etc.) and possibly USB etc. for the mboard, as brand name system builders usually do not make that info available. However, most mboards in brand name systems are made by major mboard makers and which mboard it has may be easy to determine, in which case you could probably obtain that info.
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