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Motherboard/CPU power question

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  • CPUs
  • Power
  • Motherboards
Last response: in CPUs
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a b à CPUs
a b V Motherboard
October 6, 2011 7:44:33 PM

How much power does the motherboard supply to the CPU socket? I know that the PSU supplies power to the CPU via a 8pin power connector but does the motherboard supply any additional power like a PCI-Express x16 slot does?

More about : motherboard cpu power question

a b à CPUs
October 6, 2011 7:50:24 PM

That's what the 4-pin CPU power plug does ever since Pentium 4 and Athlon 64... you plug it in next to the heatsink.. you know...
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a b à CPUs
a b V Motherboard
October 6, 2011 8:10:34 PM

I know that.I'm asking how much power does the motherboard itself supply?
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a b V Motherboard
October 6, 2011 8:28:30 PM

Technically all of it, just from the P4/8 power connector instead of the 20/24-pin main power. The 4/8-pin plug doesn't go straight into the CPU, it goes to the voltage regulators on the motherboard and then to the CPU.

Now, does any power go from the 20/24-pin main power to the CPU? Probably none. Since the P4/8 connector was added to provide 12V power to the CPU there is no reason to draw a 12V line across the motherboard to the CPU.
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a b à CPUs
a b V Motherboard
October 6, 2011 8:50:41 PM

Well I ask this because a while ago I bought a PC from Cyberpower and they used a 6-pin connector for the CPU instead of an 8-pin because the PSU didn't have one.Since I have a 125watt processor technically their wouldn't be enough power just from the 6-pin alone.That is why I asked if the motherboard supplies any power.

I changed the PSU a long time ago.
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