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A comment on 7 watts idle – building a low powered server/NAS on Intel 12th/13th gen. Parent comment

Re:7 watts idle – building a low powered server/NAS on Intel... by kogepathic on Sunday December 31, 2023 @08:23PM (#38828977)
> The Fujitsu ones have D3417(-A!) boards (not -B) having proprietary power supplies with 16 power pins (no 24pin ATX but 16pin). There are Adapters on Aliexpress for 24PIN to 16pin (Bojiadafast), but this is a bit risky - I'm validating that atm.

They work just fine. The pinout is well known [1]. You can also adapt a normal ATX PSU if you boost 5VSB to 11V.

Fujitsu boards are great, and very inexpensive to purchase in the EU. Someone has even reverse engineered the license for the KVM features of their remote management (iRMC S4/S5) [2]

[1] https://web.archive.org/web/20200923042644/https://sector.bi...

[2] https://watchmysys.com/blog/2023/01/fujitsu-irmc-s4-license/

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Re:7 watts idle – building a low powered server/NAS on Intel... by sandreas on Sunday December 31, 2023 @09:32PM (#38829309)
Oh this is pretty interesting, thank you very much. You mean that the Bojiadafast adapters work fine?

If so, I wonder if there is a hit in efficiency because of the required step-up / step-down converters in that adapter.

However, on my board there seems to be an unsoldered 24pin connector, that could be just used as is with a little soldering, but since it is on-hold my replacement system if my ...-B variant dies, I'm not willing to risk too many experiments :-)

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Re:7 watts idle – building a low powered server/NAS on Intel... by kogepathic on Tuesday January 02, 2024 @06:31PM (#38848614)
> You mean that the Bojiadafast adapters work fine?

I have no experience with this particular vendor/brand but the adapters are not complex. If you're concerned, verify that it has 11VSB before you plug it into the motherboard. Otherwise it's entirely passive (passing through PS_ON#, PWR_OK, and 12V)

> If so, I wonder if there is a hit in efficiency because of the required step-up / step-down converters in that adapter.

It should be quite nominal. The boost converters have a very high efficiency (>85%) and standby power is typically below 10W max.

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Re:7 watts idle – building a low powered server/NAS on Intel... by sandreas on Wednesday January 03, 2024 @02:43AM (#38851687)
Cool thank you... I also thought about soldering a 2$ female 24pin plug to the spot where it is on the (-B) variant... seems that they just left the plug out but the connections are there.

We'll see :-)

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