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How to use a P3 power supply with a P4 or newer motherboard.

Well its fairly simple, You need the following cable to convert your P3 power supply into P4 power supply.







The pictures pretty much explain every thing, this is the only plug that is not present on a P3 power supply. You can make this cable your self by salvaging connectors from non-working power supplies and other computer peripherals. The connections are straight forward just connect both the yellow wires to the single yellow wire and the black wires to the black wires and your done.

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i have nothing to plug p3 and p4 into when all on no signal


Sometimes if a VGA cable is not screwed into to both your Tower and your Monitor, it can get loose and thus resulting in no signal.
Another cause of a Monitor Displaying the no signal message would be due to the Graphic Card failing, or possibly due to the Graphic Card not correctly being seated.

Other Thoughts
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Usually P3 and P4 refers to a cable on your power supply that needs to be attach to your motherboard to supply extra power.

Note:
If your P4 cable is not plugged in before turning on your computer, this will also result in your Monitor displaying the no signal message.
Keep in mind though, if your computer has not been opened or is not a custom built PC, you should not have to worry about such issues as your P4 cable should in theory be connected. However I guess safely checking won't hurt anyone.

Mar 30, 2015 | Computers & Internet

1 Answer

hello.problem is.were are se place of cable p3,p4,p5,p6 on se pc acer e500?


they are usually number given to the power cord in the computer with power supply..

Jun 28, 2009 | Computers & Internet

3 Answers

Motherboard power problem due to atx 12v cable


I tried different power supply but its still not powering up. But when i remove the 4 pin 12V cable from power supply the cpu fan is rolling, it means that the power supply is working but when i tried to connect the 4 pin then the cpu fan stop just a second and never rolled on. The main problem is the 4 pin, the model is Asus P5P800-VM. I tried to reset the cmos and replaced the battery but it wont work out. Please help me!!!

Jun 09, 2009 | ASUS P5P800-VM Motherboard

2 Answers

changing a P3 motherboard for a P4 motherboard


P-4 boards want at least a 300w power supply, P3 were not so picky. Next, swapping boards is easy but remember to stay in the same form factor, (the relative size length and width) a server board won't fit in a micro case.

The location of the stand offs (where the screw holes are) may have to be changed. P4 boards have 20 pin or 24 pin power connectors so the appropriate power supply will need to be ordered. If you are running a lot of peripherals a 450w ps at least.

Now you decide if you want a board with on board, video,nic,sound,etc.

then you have to order the supported processor/heatsink and fan/thermal grease/supported Ram etc.

I've been doing this for years so i probably left out a lot.

Lately because of costs I've resorted to backward building.
I decided since DDR2 is cheap, find a board that supports that ram in a processor socket I want to use (socket 478-775) etc.

Mar 21, 2008 | Intel Motherboard

1 Answer

replacement


you should be able to use the same HDD, Floppy drive & CDrom drives, You should be able to use the case, if it has a removable plate for the outputs as they will most certainly differ from your original mobo. However you need to check your PSU as the P4 has a requirement for a 4pin 12 volt line which is not present on the older PSUs, however you can get a new PSU and fit it into your case for about £30-£40 Your P4 motherboard is also unlikely to use the same RAM as your P3 so that will need to be replaced. (as it will be incompatible with the new processor)

Oct 08, 2007 | Intel 845GE Motherboard

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