Fujitsu ATX Motherboard connector, proprietary format?
Discussion
Work was selling some of the oldish computers, so got one of the little Fujitsu desktops, Core i3, DDR3 6GB RAM etc. probably can't match my Althon X2 6000+ for processing power but ought to be more efficient. Anyway, I'm moving the internals from the small Fujitsu case to my fancy large Antec case, which seemed okay apart from the motherboard power supply connector...
Firstly, it's 16-pin, rather than 20/24-pin. This is the connector for the Fujitsu
And comparison with the 20 pin connector from my Antec PSU
Now... while the 16 leftmost pins on my PSU matches that of the Fujitsu connector (both the shape of the connectors and location of the missing pin - so it fits the motherboard albeit with 4 pins hanging off), the voltages from the Fujitsu's connector, taking the rightmost pin as ground, seems to be all -12V asides from the pin to the immediate left of ground, which is -5V, while the standard ATX connector has a mix of voltages/grounds for each pin.
Would I be correct in thinking that the Fujitsu has some weird PSU connector format (I noticed the SATA power comes out the motherboard from another connector, rather than from the Fujitsu PSU directly), and that trying to connect the Antec PSU up and trying to power it up would be a really bad idea?
Firstly, it's 16-pin, rather than 20/24-pin. This is the connector for the Fujitsu
And comparison with the 20 pin connector from my Antec PSU
Now... while the 16 leftmost pins on my PSU matches that of the Fujitsu connector (both the shape of the connectors and location of the missing pin - so it fits the motherboard albeit with 4 pins hanging off), the voltages from the Fujitsu's connector, taking the rightmost pin as ground, seems to be all -12V asides from the pin to the immediate left of ground, which is -5V, while the standard ATX connector has a mix of voltages/grounds for each pin.
Would I be correct in thinking that the Fujitsu has some weird PSU connector format (I noticed the SATA power comes out the motherboard from another connector, rather than from the Fujitsu PSU directly), and that trying to connect the Antec PSU up and trying to power it up would be a really bad idea?
Edited by MarkRSi on Thursday 27th November 19:57
Looks like a custom arrangement which, of course, is arranged to prevent the use of a standard PSU just by leaving a few pins hanging off the end of the socket.
If you can't reuse the Fujitsu PSU in the Antec case, your other option might be to rewire the Antec cable - on connectors like this it's usually possible to pop out the individual contacts from the plug body and swap them around into whichever positions you need. So long as you're certain which voltages are required on each pin of the Fujitsu connector (probing the connector with a multimeter whilst it's connected to the motherboard would be a good idea, just in case they've also used non-standard colours to go with their nonstandard pin out), and so long as the Antec cable has enough wires at each of these voltages, then with a bit of care you should be able to get it up and running with the Antec supply.
If you can't reuse the Fujitsu PSU in the Antec case, your other option might be to rewire the Antec cable - on connectors like this it's usually possible to pop out the individual contacts from the plug body and swap them around into whichever positions you need. So long as you're certain which voltages are required on each pin of the Fujitsu connector (probing the connector with a multimeter whilst it's connected to the motherboard would be a good idea, just in case they've also used non-standard colours to go with their nonstandard pin out), and so long as the Antec cable has enough wires at each of these voltages, then with a bit of care you should be able to get it up and running with the Antec supply.
Did consider that, although I'd ideally want some official reference, or at least someone whos tried it before.
Only things I could find online were these, second link seems to go with something similar to your idea but not sure if it worked or not.
http://www.tomshardware.co.uk/answers/id-2008204/p...
http://www.justanswer.com/computer/5lbfv-fujitsu-w...
Think I'll just stick it back in it's original case, was hoping to stick in a 3TB drive for NAS/backups etc. but think I'll just have to find a way of attaching it to my Raspberry Pi.
Only things I could find online were these, second link seems to go with something similar to your idea but not sure if it worked or not.
http://www.tomshardware.co.uk/answers/id-2008204/p...
http://www.justanswer.com/computer/5lbfv-fujitsu-w...
Think I'll just stick it back in it's original case, was hoping to stick in a 3TB drive for NAS/backups etc. but think I'll just have to find a way of attaching it to my Raspberry Pi.
Can't you get the motherboard reference manual from the Fujitsu TS web site? I bought a cheapo C2D machine earlier in the year as a replacement for my now 10-year-old desktop PC, and you can just enter the machine serial number to get to the various BIOS and motherboard references. http://support.ts.fujitsu.com/index.asp?lng=en
That said, my mainboard ref doesn't give power connector pinouts, but then mine might be more standard.
That said, my mainboard ref doesn't give power connector pinouts, but then mine might be more standard.
droopsnoot said:
Can't you get the motherboard reference manual from the Fujitsu TS web site? I bought a cheapo C2D machine earlier in the year as a replacement for my now 10-year-old desktop PC, and you can just enter the machine serial number to get to the various BIOS and motherboard references. http://support.ts.fujitsu.com/index.asp?lng=en
That said, my mainboard ref doesn't give power connector pinouts, but then mine might be more standard.
Cheers, I'll check that out later on That said, my mainboard ref doesn't give power connector pinouts, but then mine might be more standard.
There's a few odd serial numbers here and there but none seem to stand out.FunkyNige said:
Isn't the Fujitsu connector the standard AMD connector? I have vague memories from building my AMD machine that the connector from the PSU doesn't use all the pins and hangs off the end a bit.
Think it's the Intel motherboards that use all the pins, could this be it?
No idea, it's an Intel board I've got though, quick google online doesn't seem to throw anything up about a 16 pin AMD connector. Could have 24 pin PSU connector into a 20 pin on your AMD machine?Think it's the Intel motherboards that use all the pins, could this be it?
droopsnoot said:
Nice one, found this (it's a 'D3171')http://support.ts.fujitsu.com/Download/ShowDescrip...
However, it states " not supported by standard Power Supplies" and doesn't give any details of the pinouts
looks like I'm stuck unless I'm willing to hack together a connector. I'll just use the original case, no big deal.Might need to get a low profile graphics card though...
That note about power supply support is just for the fan control though, and seems to be marked as '-' for that board in any case. This page ( http://www.sp-it.net/index.php/articles/257-mainbo... ) suggests that it's a 12v-only motherboard, which might imply that it uses the 16-pin connector on Wikipedia ( http://en.wikipedia.org/wiki/Power_supply_unit_%28... ) :
"Since 2011, Fujitsu and other Tier 1 manufacturers[9] have been manufacturing systems containing motherboard variants which require only a 12 V supply from a custom made PSU (typically rated at 250–300W). DC-DC conversion, providing 5 V and 3.3 V, is done on the motherboard; the proposal is that 5 V and 12 V supply for other devices, such as HDDs, will be picked up at the motherboard rather than from the PSU itself (though this does not appear to be fully implemented as of January 2012).
The reasons given for this approach to power supply are that it eliminates cross-load problems, simplifies and reduces internal wiring which can affect airflow and cooling, reduces costs, increases power supply efficiency and reduces noise by bringing the power supply fan speed under the control of the motherboard. Other advantages it offers is the potential ability to power a PC off a sealed lead-acid 12 V battery, or from automotive power without using a power inverter.[citation needed]
At least two of Dell's business PCs introduced in 2013, the Optiplex 9020 and Precision T1700, ship with 12 V–only power supplies and implement 5 V and 3.3 V conversion exclusively on the motherboard."
ETA: Ties in with your note above that the drives are powered from the motherboard rather than the PSU.
"Since 2011, Fujitsu and other Tier 1 manufacturers[9] have been manufacturing systems containing motherboard variants which require only a 12 V supply from a custom made PSU (typically rated at 250–300W). DC-DC conversion, providing 5 V and 3.3 V, is done on the motherboard; the proposal is that 5 V and 12 V supply for other devices, such as HDDs, will be picked up at the motherboard rather than from the PSU itself (though this does not appear to be fully implemented as of January 2012).
The reasons given for this approach to power supply are that it eliminates cross-load problems, simplifies and reduces internal wiring which can affect airflow and cooling, reduces costs, increases power supply efficiency and reduces noise by bringing the power supply fan speed under the control of the motherboard. Other advantages it offers is the potential ability to power a PC off a sealed lead-acid 12 V battery, or from automotive power without using a power inverter.[citation needed]
At least two of Dell's business PCs introduced in 2013, the Optiplex 9020 and Precision T1700, ship with 12 V–only power supplies and implement 5 V and 3.3 V conversion exclusively on the motherboard."
ETA: Ties in with your note above that the drives are powered from the motherboard rather than the PSU.
Edited by droopsnoot on Tuesday 2nd December 12:30
droopsnoot said:
This page ( http://www.sp-it.net/index.php/articles/257-mainbo... ) suggests that it's a 12v-only motherboard, which might imply that it uses the 16-pin connector on Wikipedia ( http://en.wikipedia.org/wiki/Power_supply_unit_%28... ) :
Bah, missed that bit when skimming over the PSU wikipedia page earlier, clears it up then, cheers 
I ended up just using the Fujitsu case, including the original power supply with it's funny 16-pin connector.
FWIW despite it being a small case (low profile) I've had it running for a while with two hard drives and a GTX 750Ti graphics card - running for months at time with Folding @ home, playing GTA5, Skyrim and more recently the new Tomb Raider game. So the Fujitsu power supply is probably a bit over specified probably helps having a modest i3 processor which doesn't pump out much heat even when running under full load.
FWIW despite it being a small case (low profile) I've had it running for a while with two hard drives and a GTX 750Ti graphics card - running for months at time with Folding @ home, playing GTA5, Skyrim and more recently the new Tomb Raider game. So the Fujitsu power supply is probably a bit over specified
probably helps having a modest i3 processor which doesn't pump out much heat even when running under full load.Ack, what a pain. I just picked up and old work PC to and was in the process of gutting it and my new one to create a new gaming PC. Got to the point I needed PCIExpress power, then realized the PSU in the work PC wasn't much, then finally realized the mobo used that annoying 16 pin power cable and not a 20/24pin cable my more powerful psu has. Guess I'll rebuild them both and maybe consider buying a new motherboard. Such a nusiance. Was really looking forward to using the core i7 cpu from the work pc with my high end graphics card.
my solution is now the fujitsu pc in its own case, my own powersupply jumpstarted on top of it with an led strip on it connected so i can safely jumpstart this powersupply before i start the pc.
it works, but airflow is 0 in the case with this solution. Saving so i can buy my own motherboard so i can advance
it works, but airflow is 0 in the case with this solution. Saving so i can buy my own motherboard so i can advance
I found this 24pin to 16pin Fujitsu power supply adapter here:
https://www.ebay.co.uk/itm/154443007775
It has the required special 12Volt standby wire.
https://www.ebay.co.uk/itm/154443007775
It has the required special 12Volt standby wire.
Edited by mouffy on Thursday 13th May 17:40
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