pentiumspeed wrote on 2023-01-22, 20:42:

DO NOT PLUG INTO, your with ATX power supply, you need adapter cable first! […]
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DO NOT PLUG INTO, your with ATX power supply, you need adapter cable first!

Needs ATX to DELL adapter cable, I bought couple while ago.

Tricky to find but I did find it again.

https://www.ebay.ca/itm/234303646117?hash=ite … ABk9SR6ajx7O7YQ

Cheers,

Hello again, after all this time, I dig into it a bit and contacted the seller regarding the adapter, provided them with the motherboard pic and as much info as I could find. They replied that this adapter would not work with my board. Have you tried it in this particular one ? Should I try to find something else ?

TonyStark wrote on 2024-05-18, 07:49:

pentiumspeed wrote on 2023-01-22, 20:42:

DO NOT PLUG INTO, your with ATX power supply, you need adapter cable first! […]
Show full quote

DO NOT PLUG INTO, your with ATX power supply, you need adapter cable first!

Needs ATX to DELL adapter cable, I bought couple while ago.

Tricky to find but I did find it again.

https://www.ebay.ca/itm/234303646117?hash=ite … ABk9SR6ajx7O7YQ

Cheers,

Hello again, after all this time, I dig into it a bit and contacted the seller regarding the adapter, provided them with the motherboard pic and as much info as I could find. They replied that this adapter would not work with my board. Have you tried it in this particular one ? Should I try to find something else ?

Not sure in the accuracy of this, but according to the first link below it seems this board may only work with a non-PFC power supply (they're quoting either Dell p/n 9228C or a suitable OEM unit with a correctly wired AUX adapter)

Dell forum post - https://www.dell.com/community/en/conversatio … 4ccf8a8de8b5a0f

Dell-style AUX adapter - https://www.atxpowersupplies.com/Dell-P10-con … tor-adapter.php

There's more info on the AUX wiring at the next two links...

https://pinoutguide.com/Power/MotherboardPower_pinout.shtml (bottom of the page)
https://old.pinouts.ru/Power/dell_atxaux_pinout.shtml

There's a YT video of someone with the same issue (failed non-PFC power supply, but on a different Dell system) - https://www.youtube.com/watch?v=h5wmwfsbaNM

PFC is a power factor correction and has nothing to do with the actual secondary side output.

PFC converts out of phase resistivity and current into in-phase as true power as seen from power utilities viewpoint and is pre-primary side. It is increasingly required to have PFC.

AC is fed into PFC circuit first thing, then rectifiers and capacitors to convert into dirty DC which now goes through transistor choppers into primary side winding of the main transformer with feedback circuits which monitors the secondary side with diodes outputs and filtering inductors and capacitors that generates stable regulated DC outputs.

So, do not worry about using ATX power supply with PFC or not and go ahead and use Dell cable adapter to use ATX with PFC power supply on a Dell motherboards that uses 20 pin and 6 pin connectors on these. I rather have a high efficiency PSU of Gold 80.

All power supplies that is plugged into AC always have isolation between primary and secondary in a trasnfoermer even the feed back circuit also have electrical isolation.

Cheers,