PSU buzz when game is on screen

[Mercuryaces]

Hey guys, I just encountered an issue that was not present before just now. When a game is on screen, it seems that the PSU makes a buzzing noise, if I tab out of the game the noise is gone completely, it is only while a game is on screen. What is the cause of this and should I be worried?

 

SOLVED: The problem was after I set the framerate to run at max. In game menus ran at maximum FPS and probably caused spikes in power consumption.

[TempestCatto]

Sounds like coil whine. Are you sure it's not from the GPU? Generally, coil whine is harmless, but annoying to the ears.

[Mercuryaces]

Just now, TempestCatto said:

Sounds like coil whine. Are you sure it's not from the GPU? Generally, coil whine is harmless, but annoying to the ears.

i'm sure its not gpu. 

[Arttu89]

It's very odd to have any buzzing sounds coming from the PSU, while gaming, if possible i'd try a diffrent PSU just to confirm that's where the sound is coming from.

[Guest]

6 hours ago, Mercuryaces said:

Hey guys, I just encountered an issue that was not present before just now. When a game is on screen, it seems that the PSU makes a buzzing noise, if I tab out of the game the noise is gone completely, it is only while a game is on screen. What is the cause of this and should I be worried?

 

SOLVED: The problem was after I set the framerate to run at max. In game menus ran at maximum FPS and probably caused spikes in power consumption.

What PSU and what graphics card?

 

[Mercuryaces]

18 hours ago, jonnyGURU said:

What PSU and what graphics card?

 

its an EVGA 750w gold+ and an RTX 2080

[Guest]

3 hours ago, Mercuryaces said:

its an EVGA 750w gold+ and an RTX 2080

NEX750?  G2?  G3?   G2L?  GQ?  G+?

 

The G2, G3 or G2L are a softer switching LLC resonant topology and shouldn't make noise with a GTX2080 even with the games running at max.  If it does, it's defective and you need to RMA it.

 

The NEX750G, G+ and GQ use an active clamp, reset forward topology that has some hard switching that can cause transformer noise under high slew loads.  Nothing you can do about it except for buy a better PSU.  These are cost oriented PSUs and not something anyone expects to be paired up with a $700 graphics card.

 

 

 

[Mercuryaces]

19 hours ago, jonnyGURU said:

NEX750?  G2?  G3?   G2L?  GQ?  G+?

 

The G2, G3 or G2L are a softer switching LLC resonant topology and shouldn't make noise with a GTX2080 even with the games running at max.  If it does, it's defective and you need to RMA it.

 

The NEX750G, G+ and GQ use an active clamp, reset forward topology that has some hard switching that can cause transformer noise under high slew loads.  Nothing you can do about it except for buy a better PSU.  These are cost oriented PSUs and not something anyone expects to be paired up with a $700 graphics card.

 

 

 

It is a GQ model. So then, is it an issue that I need to worry about, or simply some unavoidable noise that isn't a concern? thank you for the very informative post by the way!

[Guest]

Unavoidable noise, but harmless. 

 

Consider a quality PSU in the future if you want to avoid such noise.  Especially if you're going to use it to power a $700 graphics card.  

[Rexper]

On 2/26/2019 at 9:00 AM, jonnyGURU said:

softer switching

What exactly do you mean by "softer" and "harder" switching?

Is there a difference between double forward and ACRF, or half bridge and full bridge in terms of switching 'hardness'?

[Stefan Payne]

46 minutes ago, Rexper said:

What exactly do you mean by "softer" and "harder" switching?

He means that one switch whenever, the other ones only at the Zero Voltage and/or Zero Current point.

 

You see with older PSU from some Manufacturers (like Enermax) be advertized at "zero voltage switching" or something like that.

[Guest]

On 2/27/2019 at 4:20 PM, Rexper said:

What exactly do you mean by "softer" and "harder" switching?

Is there a difference between double forward and ACRF, or half bridge and full bridge in terms of switching 'hardness'?

And to answer the rest:

 

Active clamp is still a forward topology but with the waveform peaks "clamped" so smaller magnetics can be used. 

 

Half bridge and full bridge are resonant topologies and don't apply to forward topologies.