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Power supply and motherboard

By JimKlallsoo ·
My motherboard went bad and needed replaced so i took my PC into a electrical retailers who were doing deals on new Mainboards & processors. They said i need to fit the Parts but they could sell them.

What i had was a P111 - 1GHZ processor and the board to match, before the board went bad.

When i left the electrical retailers he told me i needed a new mainboard which i bought and also a processor to match. I also needed new RAM which he said needed to be in the new Mainboard. I agree this is the case, however the board won't boot when all all ide stuff are connected eg HD &DVD.

The mainboard power leads are completely diffeent on this new mainboard to my old power unit now the guy is telling me i need a new power unit.

My question is this:

1 - Does it matter what power supply unit is in a PC?
This new mainboard is an Athlon Socket 754 Sempron

2 - Is there a difference between the power supply for an AMD Athlon and a Pentium?

3 - I have had pentium 2's and Pentioum 3's and all the power leads are roughly the same but now on this there is a 4 pin connector which goes directl into the board but i don't know whay.

I understood the floppy power, IDE power and the long power thing which plugs into the mainboard but now there seem to be a coupl of new 4 pin connectors which plug into the mainboard what are these for and do they need to be plugged in?

A speediant answer in any greatly appreciated. Thanks to all in advance who take time to read/reply

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by Jacky Howe In reply to Power supply and motherbo ...

The 4 pin connectors power the CPU. Without power to the CPU the board won't function. If your power supply does not have this connection you will have to replace it. There is no difference between AMD and Pentium PSU's.
Suggestion: Always use a respected PC supplier.

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by storm.hightower In reply to Power supply and motherbo ...

1 - Does it matter what power supply unit is in a PC? This new mainboard is an Athlon Socket 754 Sempron...

Answer: Yes it does, the power supply varies in voltage and plugging the wrong one in can do more harm than good. When buying power supply for any motherboard always, always check the user manual that came with your board, if you don't have one the look your board up online.

2 - Is there a difference between the power supply for an AMD Athlon and a Pentium?

Answer: Sometimes there is, but it depends on the power requirement of the mother board.

3 - I have had pentium 2's and Pentioum 3's and all the power leads are roughly the same but now on this there is a 4 pin connector which goes directl into the board but i don't know whay.

Answer: Some mother boards have those types of connectors...I would check you maul to make sure your power supply is the right one for your mother board

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by HAL 9000 Moderator In reply to Power supply and motherbo ...

Yes they are completely different the new M'Board has a 24 Pin ATX socket and not the older 20 pin ATX socket so you need a 24 PIN ATX Power Supply as well as that extra 4 pin socket that drives the CPU.

While you can get a 20 to 24 pin adapter in reality they are not much chop and it's better to get a 24 pin ATX power supply and one of the better ones as well as they are far more stable and offer a level of protection that many never even think about.

Col

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