Acceptable PSU Voltage Drop ?

[stock12to32]

I have recently purchased a Lepa 1600W Full Modular PSU. I am getting some big drops in voltages even under small loads and I am wondering what is acceptable.
I have messaged Lepa a few days ago and still waiting on a return message from them.
I had a Antec 900W High Current Gamer PSU in my system and I would monitor my voltages and they would stay above the spec voltage.12v 5v 3.3v
I have a lot of stuff running in my computer with it being water cooled and I did not want to burn the Antec up so I purchased a Lepa 1600w PSU and when I put a load on the system through games I notice I big voltage drop. 12v = 11.74v, 5v = 4.8v and 3.3v = 2.8v.

Is that ok or should I be looking for a RMA on the PSU ?

I am judging this by how my Antec PSU performed, but the Lepa is gold certified.
I am getting the readings from AIsuite but it seemed to have done a good job on monitoring my Antec.
I have read the support page on the Lepa website and I have plugged PSU directly in to the wall. I made sure that I have spit the power load on each 12v rail and it did not make any difference.

[Arne_Saknussemm]

Hi there! 🙂

The drop on the 12v rails is only 2.2% on the 5v 4% but on the 3.3v that's 15% which seems a bit much to me. Gold certified is efficiency and doesn't say much for this kind of thing. It's just total power in divided by power out and averages can always hide a lot. Since most power is through the 12 volt rails quite a bit of ineficiency can be hidden on the lower rails!

Looking at the spec sheet it is well within the undervolt protection range so probably OK.

Let us know what they say!

[HiVizMan]

Me personally I would not use that particular PSU at all. But then I am ultra cautions about power supplies.

[Zka17]

Yeah, too much deviation... 😞

[Arne_Saknussemm]

You could try a couple of different monitoring programs too just to be sure. Everest, HWmonitor, etc.Never have two programs polling at the same time though, since they interfere and will give out garbage results. Relying on AI suite alone may not be the best idea ...:rolleyes:

[Zka17]

Actually I would use a PSU tester first...

[Arne_Saknussemm]

Well, yep, of course you're right!....only real way, in truth, is a multimeter at the atx connection.......

Forgot to say this but I'm in agreement with my virtualcolleages.....this PSU would not go in my rig if those readings are correct.....OK is not good enough for a nice system. The PSU is one of the most important foundations of the system.

[stock12to32]

I dont know how but my PSU is not dropping in Voltages like it was fresh out of the box. Now 12v are only dropping to 11.9v under 100% load. 5v are staying above 5v and the 3.3v are only dropping to 3.28v
:cool:

[xeromist]

Might have just taken some time to "burn in" so to speak. I'd check it again from time to time just to make sure this isn't a fluke. For future reference your voltage needs to be within +/- 5%

[stock12to32]

I said in the last post that I didn't know how but voltages were ok, but I think I do know what happen after thinking about it. When Lepa emailed me back they asked me to check my voltages with a volt meter and not motherboard software. I think after unplugging, testing a reinstalling the cables, I found when plugging the cable from the motherboard back into the PSU it was extremely tight and hard to get it pushed all the way in. I pushed until I verified the lock on the connector was locked and I verified that the plug was in the socket straight. I sure my problem with the extreme voltage drops were due to the cable not being plugged into the PSU completely and had a bad connection. after I put everything back together I noticed almost no voltage drops.
Ounce again, Thank you to everyone for your input.