Would have been too nice though - thanks anyway! Waiting for a bunch of resistors to arrive to run some tests on the pins...Edit: disregard below. I counted wrong number of pins.
I'm 90% sure it follows an OCS Power Supply Spec V2.
Spec page here on OpenCompute wiki
Download page here..
OCS Open CloudServer Power Supply V20.
For easy reference..
Oh you've got updates from another forum, that's great. Yep when I skimmed the pdf spec, that ps_kill jumps right to me. For some reason I thought it won't be as straightforward.
Well the spec is there, will come back to it this evening when I got the time.
Actually it’s what i’m hoping for- my rough and completely unverified plan is to run the +5v standby power from the PSU directly to the motherboard (that implies detaching the 5v output from the pico) assuming that this allows the PS_ON on the MB to be triggered by the power button and re-routed to the PSU along with PS_KILL. If signals are not compatible (again, ZERO documentation on the Supermicro) it might have to involve some switching logic.
Just happen to have some free time after lunch...
Am I correct that this spec's ps_on is just like atx?
So in essence you can just find a picopsu that exposes atx 24 pin's ps_on and connect those to corresponding pin on the supermicro and it'd work?
Have you seen @Thehack 's 24-pin-to-7-pin, M2427 project?
Nice squeeze with that PSU, but I am curious if you're going to have room for the mobo in there....
Hypothesis is to have a pico 160 in the middle and only bypass 5v and PS_ON- the pico should take care of the other voltages required.Ps_kill just needs to be pulled to ground with a 100 ohm resistor so you can do that on the psu. There is no ps_kill on atx standard. It's used for hot plugging.
Unfortunately afaik most server psu only provides 12V and 5VSB (sometimes they even use 3V3 for this), so to conform to atx you'll need -12V (not sure how prevalent this one on modern boards), 5V and 3v3 rails. I think M2427 just routes this from the psu.
That's what we wanna hear ^^. Now we go spec hunting! Don't fail me today, my google-fu!The unit generates a separate 5v and 3.3v rail for the 24 pin when the PSU is switched to on.
My hunch is that the pins with notches on them carry special meaning - if we count them from the first pin to the last one it's 7 pins - just like many specs I've seen. Then 4 pin after that, could be an extension to the standard - other voltage rails, just like 5V that you found.SHOULD ANYONE HAVE ANYTHING RELEVANT ON RECORD - PLEASE BE IN TOUCH!
Plugging it in and assuming that the bigger pins carry major loads, I could quicky detect the +5V standby rails and ground - that's unfortunately as far as I got for the time being.
I’m looking at @guryhwa ’s gflex cable used in his Mr. Haru build. Basically as flat asNow we just need to rush @Thehack on his M2427! It is September after all...
What plan do you have on pcie riser? Hardly any room beneath the tubing, let alone a 90° bend...
A bit unrelated, after all this time I just noticed that S4M's side panels doesn't have any screws on it, only the sides. That does help on fitting stuff.