Northwood motherboard with two 4pin power connectors? \ VOGONS

Northwood motherboard with two 4pin power connectors?

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First post, by VanillaFairy

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Iiiit's me again, with my wonky OEM Sony Vaio motherboard I'm making a retro system out of.

I noticed somewhat recently that the motherboard (ASUS P4S533-VX) has two 4pin connectors; one by the 20pin ATX power connecter, and one by the CPU socket.
The one by the socket is labelled "ATX12V1", with the one by the ATX connector being labelled ATX12V2...

would both need to be connected?
They're the same plug shape, and both labelled as 12V. if both were needed, would a 4pin splitter suffice? (or, I guess an 8pin to dual-8pin, since the PSU I chose is a modern one and has an 8pin CPU connector)
And if only one is needed, would that give any worse performance with a higher clocked CPU?
(The CPU I managed to somehow get my hands on for cheap enough was a Pentium 4 HT 3.06. (with a 533MHz frontside bus), which I think should be the best this motherboard can actually do since it has a max bus speed of 533 MHz.)

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Reply 1 of 5, by BitWrangler

Posted on Today, 17:15

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If the PSU is a recent one, does it not have a 24 pin with possibly detachable 4 pin? that should be the extra that's by the 20 pin.

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Reply 2 of 5, by VanillaFairy

Posted on Today, 17:30

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unfortunately not, it's a non-modular PSU (Corsair CX550) and the 24pin is just one big thing.
I could probably dig out the old PSU from the original computer this motherboard came from just to check what the ports actually are, although I don't exactly trust that PSU with anything more than the 2GHz Celeron it came with though.
(Or with my lungs, considering the dust. it was the only exhaust that original PC had....)

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Reply 3 of 5, by PC Hoarder Patrol

Posted on Today, 19:28

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VanillaFairy wrote on Today, 17:30:

unfortunately not, it's a non-modular PSU (Corsair CX550) and the 24pin is just one big thing.
I could probably dig out the old PSU from the original computer this motherboard came from just to check what the ports actually are, although I don't exactly trust that PSU with anything more than the 2GHz Celeron it came with though.
(Or with my lungs, considering the dust. it was the only exhaust that original PC had....)

Their naming seems to suggest they're both the same - P4 +12v DC connectors (the additional 4 pins on an ATX 20+4 socket have a different keying)

If I'm reading the Sony PCV-RZ series service manual correctly, only ATX12V2 is connected (maybe ATX12V1 is only used as well with higher draw CPUs)

The attachment 46c502 (p32).pdf is no longer available

Reply 4 of 5, by cyclone3d

Posted on Today, 19:50

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According to Corsair, the 8-pin is a 4+4 pin. It should be able to unclip in the center so you end up with 2x 4-pin.

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Reply 5 of 5, by VanillaFairy

Posted on Today, 20:38

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cyclone3d wrote on Today, 19:50:

According to Corsair, the 8-pin is a 4+4 pin. It should be able to unclip in the center so you end up with 2x 4-pin.

The pin shapes of the two halves is different; left half is the normal 4pin, the other half is.... everything's the same shape?
I guess I could fit it in, and the standard pinout at least should be consistent, although I've tried and can't seem to figure out how exactly to unclip it.
(Probably it'll take a bit more than just brute force and ignorance)

PC Hoarder Patrol wrote on Today, 19:28:

Their naming seems to suggest they're both the same - P4 +12v DC connectors (the additional 4 pins on an ATX 20+4 socket have a different keying)
If I'm reading the Sony PCV-RZ series service manual correctly, only ATX12V2 is connected (maybe ATX12V1 is only used as well with higher draw CPUs)

The attachment 46c502 (p32).pdf is no longer available

I thiink this motherboard was specifically a Sony PCV-RX401 in its past life, or at least something from the PCV-RX series.
To be honest I have no clue if my 3.06GHz P4 actually is compatible even, I'm just guessing that it will be. though if it isn't, it'll probably just be some BIOS update that's needed.

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