RM850X Buzzes with car inverter not ac

[badmatrixbumper]

Let me clarify something firstly.

 

This powersupply works FINE. Yes I'm serious, 100% works fine.

NO BUZZING (cough... when using 120v AC from wall).

 

On a unique project of mine, and that I'm having to be alone, I'm building a brief case (itx board, 16gb ram, 1800x cpu, win 10, gt 710 2gb) all this for telescope camera lol) computer using this powersupply.

 

However...

 

I'm planning on hooking this up to a car inverter, when I do use it on inverter it makes a buzzing noise, similar to a fan blade hitting something.

 

Does anybody have any thoughts on whats going on? :confused:

Inverter is a Cobra 800w inverter.

 

(edit). This power supply is beyond over kill for what I need. I am planning on finding a much smaller unit, just this is what I have for now to use. thx.

Edited January 16, 2021 by badmatrixbumper

[CHFlanker]

Hey,

 

I had similar issues with a "car inverter". I wasn't trying to power PC components with it but the effects should be similar.

 

What I found is that there are inverters with "sine wave" or "true sine wave" output which is something you will want to look for in a project like this.

 

The science behind it is that "cheaper" inverters have a output with a rectangular AC and not a sine wave like the wall outlet has.

Sensitive electronics (like a PC PSU) need the AC to be in a exact wave form to function properly.

 

Let us know how it went.

[LeDoyen]

maybe there's more to it because modified sine wave shouldn't be an issue for the PSU at all.

 

https://forum.corsair.com/v3/showthread.php?t=201845

[badmatrixbumper]

I'm at a loss.

So is this buzzing noise I am hearing from using a car inverter causing damage to the power supply?

[Corsair Notepad]

Sounds more like the inverter isn't providing clean and consistent power. At least not at the levels a system like this would require.