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Start motherboard without CPU

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kaumune Posted messages 22691 Registration date   Status Contributeur Last intervention   -

Hello, I’m building a new PC and I would like to test the compatibility of my motherboard with the RAM from my previous build. I haven't received the CPU yet, so I connected the motherboard and tried to power it on without the CPU to see with the LEDs if the RAM was detected by the motherboard, but nothing happens when I press the power button.
My motherboard: Asus TUF Gaming B550-Plus
The power supply works (it powered the previous build), the button does too, I’ve connected the 24-pin and 8-pin to the motherboard, and when I turn on the power supply, I see the ambient light of the motherboard, but absolutely no reaction when I press power. Is this normal?
Thank you in advance.

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Answer 1 / 2
flo88 Posted messages 28885 Registration date   Status Contributor Last intervention   Ambassadeur 5 144
 

Hello

You're trying to start a car without the engine, so that's perfectly normal, and by the way, I don't know who gave you that idea but it's harmful to the motherboard.

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Oh really, I checked beforehand and there are quite a few sources that say it's doable and none that say it could damage the motherboard.
Well, I'll wait to receive the CPU then, thanks.

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flo88 Posted messages 28885 Registration date   Status Contributor Last intervention   5 144 > High
 

Your sources know nothing at all

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Answer 2 / 2
idefix
 

Hello

If a motherboard is not designed to start without a CPU, you will have to put back the old CPU and the old RAM. If everything is compatible, you should be able to do something in the meantime.
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Oh really, so it's possible that it's just the model that's designed not to start at all without a CPU.
No, my old CPU is not compatible, so I'll wait to receive the new one then.

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kaumune Posted messages 22691 Registration date   Status Contributor Last intervention   5 156 > High
 

Hi

No PC can start without its processor

Indeed, where does this ridiculous idea claiming otherwise come from?

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