Lepa G1600W PSU for Antminer S7 - Can't power it on ! Bounty 0.05 BTC

[vortexz]

I have multiple Antminer S7, with multiple PSU's from corsair, EVGA, coolmaster, running 4 Antminer S7

Today my 5th Antminer S7 has arrived and I have also bought a 5th PSU for it
I got it brand new, connected all 10 PCI-e PINS to the S7, the MB cable, put the paperclip switch to it and tried to turn it on ... surprise, it won't work

Anyone has any experience with this PSU ? I have noticed the MB cable is a bit different than at my other PSU's
The MB cable is split in 2 in the part where it comes into the PSU, and 1 part has 12 small slots

here are the pictures of the MB cable :









I will give 0.05 BTC to whoever helps me solve the mistery !

[mavericklm]

Suna-ma! am una pusa pe un batch7

[wayniac30]

The socket starts with rounded-square-square-rounded-rounded but from the pictures i see your plug doesn't?

[wayniac30]

Sorry picture was unclear.... socket and plug seem right

[mavericklm]

Looks like you need to make contact between the 2 round at the ''clip'' side of the mobo connector on the psu!

Do not connect to the last 2 as they are red!!!!(5volts?)

[VirosaGITS]

Does the PSU turn on at all? A bit unclear if both do not turn on or if only the miner does not turn on.

[vortexz]

The PSU does not turn ON at all!
The S7 miner works just fine, I tested it with another PSU

[vortexz]

it finally powered ON, when no cable was attached to the MINER
then I powered it off, I connected it to the miner and after a minute or too it powered off again

[mavericklm]

sounds like rail overload? try just 2 blades, not all 3!

[notlist3d]

I would get a PSU tester from amazon, you can get it pretty cheap or you can go nicer with PCIE testers and LCD.   That will allow you to measure current if it's working at all.

But if it truly is not powering on check and make sure paperclip is making contact with metal within it.  Make sure you have on a right combination of 2 wires.   And if that does not work you likely will need to email manufacture. 

[VirosaGITS]

sounds like rail overload? try just 2 blades, not all 3!

Should really not be an issue.

Some cables i've had were weird and i had to mess around them with the multimeter before they worked. Not sure whats up with that.

[vortexz]

I tried powering only 2 blades and it seems to be working ...
seems the G1600w Can't handle 1400W...

[mavericklm]

batch 8? 'cause i can try it too

[VirosaGITS]

I tried powering only 2 blades and it seems to be working ...
seems the G1600w Can't handle 1400W...

It should be handling up to 1775w at the wall or something. Its a shitty multirail PSU.



So you're going to have to spread to load among the multi rail properly to run it. Then it should run fine.

[mavericklm]

Told him already

You need 8pin cpu to 6pin vga to pull 12v from the 2 20A rails, v1 and v2

I can test it on batch 8, already working on batch 7

[VirosaGITS]

Told him already

You need 8pin cpu to 6pin vga to pull 12v from the 2 20A rails, v1 and v2

I can test it on batch 8, already working on batch 7

Why? He can just spread the load on the 30a's. Could slap the controller on a 20a but not obligatory.

[mavericklm]

because 4 rails of 30A give only 1200watt and batch 8 eats over 1300watt

[VirosaGITS]

because 4 rails of 30A give only 1200watt and batch 8 eats over 1300watt

...huh nope.

30A*12 = 360w per rail, time 4 equal 1440w for the 4 rails. And the DC draw is under 1300watts for the 3 blades at stock settings. At the wall you will get 1430W~ At 40% fan speed or so.

[mavericklm]

my bad! sorry
i like to spread it better and not risk it.
why would i burn an 200$ psu!?!?

maybe the fact that it's not working on those 4rails it's saying that 30a is not really 30a....

[Gornidah]

I've burn 2 LEPA 1600PSu's in my S7, the first one worked for about 5 minutes, the second not even 1, replaced it with an EVGA 1300.
Its a shitty PSU, Tupsu warned me, he have burn some too, but I had already purchased it...
IMO you should get a server PSU or an EVGA G2.