Lepa PSU g1600 kills powered risers?!

[lorbas]

Got my Lepa G1600 today and replaced my "old" PSU (LC-Power 1000) which I had used for testing purposes. I used powered 1x - 16x risers with that PSU and it worked like a charm. Now that I got the Lepa G1600 I suppose it "killed" three powered risers already. I noticed a spark coming from the PCIe 1x-Slot and smoke that must have come from the risers's capacitor. Confusing.

Has anyone encountered the same issue and if yes, did you find a solution solution? And who's to blame? PSU or riser...

Thanks in advance!

[1715233735]

1715233735

[1715233735]

1715233735

[EasyQuest]

are the risers powered? meaning does it have molex connector?

[innovation]

How many gpu cards and which one?

[padrino]

I have a LEPA G1600 I used with mine and have had no issues.. Have the basic CHinese risers with a capacitor on them. You can smoke the capacitor if you plug the riser in backwards. Both the LEPA connectors and the riser connector should be keyed but I know from experience if you don't pay attention and force it the capacitor will smoke..

[Blazed]

I have 20+ LEPA 1600 PSU's never had that issue.  The only issue is if you run 5 GPU's you have to split the rails up since they are shared.  Only use 4 sets of PCI-e cables.. The fifth card use 1 pcie cable and a molex cable with adaptor.

[vadoff]

Yeah, maybe you plugged the 1x riser into the motherboard backwards?

[lorbas]

Hmm.. if I had placed the risers in backwards, I must have done it three times already since three risers are dead by now. And since I was neither drunk nor I am dumb ..

Strange thing tough, after the first risers died I tested all the other riser's quality attaching them to an old HD3450 like I would have done with my 7950's. All risers passed the test. Then I put back my 7950 and: boom! riser = RIP.

I assume that the 7950 draws more wattage from the molex plug than the HD3450? In combination with that the LEPA's starting current may be too high so that capacitors on the risers can't cope with it?

But if I knew that was the answer: What could I do? I really don't want to fry my risers, Cards, MoBo, BUT I also wanna Keep my LEPA 

[lorbas]

To be honest, the quality of all powered risers I've seen so far freaks me out anyway. Doesn't look trustworthy to me at all.

And I'm tihinking of just removing the powering-stuff from some of the risers and go with a more unpowered in order to reduce the chance of frying my hardware. Or could powered risers act as unpowered risers by simply not powering them as well?