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GTX 780 and coil wind - Help/advise needed

post #1 of 11
Thread Starter 
Hi. I often visit this forum for info just never posted, but today I need some personal advise on this:

I spend last 3 days trying everything no narrow this noise down (mobo/PSU/CPU swaps). And as much as the new motherboard reduced the noise in the speakers the card still makes the noise thats noticeable when under load (i.e. Windows Performance Index, or Benchmarks, some heavy games).

Do any of the owners of GTX 780 have this noise? Should I RMA the card? I mean this is $600 card after all, this was a quite unpleasant surprise to me as the noise is not loud enough to be heard when case is closed with fans on but I can still hear the noise through the speakers when I mute the sounds...

Would this get worse? could this kill the GPU?

What you guys think?

edit: EVGA GeForce GTX 780 FTW w/ EVGA ACX Cooler Video Card

comes stock with Core Clock @ 980MHz and Boost Clock @ 1033MHz
Edited by Stevethecleave - 3/10/14 at 3:45pm
post #2 of 11
post more info on the card.
post #3 of 11
how are your speakers connected and to what?

e.g. motherboard analogue out, sp/dif, HDMI to receiver etc?

motherboard analogue outs often have a lot of noise on them
 
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post #4 of 11
Thread Starter 
Quote:
Originally Posted by pharcycle View Post

how are your speakers connected and to what?

e.g. motherboard analogue out, sp/dif, HDMI to receiver etc?

motherboard analogue outs often have a lot of noise on them

Motherboard analogue 5channel, build-in amp in the surround sounds, no receiver.... noise is also present in headphones

This was minimized with a new board (both with integrated sound card) as the old one was un-usable ... yes that loud... thing is, there is no noise with my gtx 570 at all.... no card noise no speaker noise

This is coming directly from the GPU as I can hear the card making similar sounds as come through the speakers (again PSU was swapped too- 3 of them all the same amount of noise)
post #5 of 11
it's just poorly isolated audio DACs on the motherboard - at certain frequencies basically all your PCB tracks are capacitively coupled to some extent so the high frequency signals from the GPU are being coupled through your motherboard or case into the DAC and out to your speakers/headphones.

On cheap motherboards I've heard noise through headphones when moving a USB mouse for example. Your noise could even be coupled through your monitor cable if it is poorly shielded (e.g. the high frequency LVDS coupled to the cable shield, causes noise on your chassis earth which is turn causes noise on your audio out of motherboard).

Coil whine is normal, a dedicated sound card will almost certainly cure your problem.
 
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post #6 of 11
Thread Starter 
Quote:
Originally Posted by pharcycle View Post

it's just poorly isolated audio DACs on the motherboard - at certain frequencies basically all your PCB tracks are capacitively coupled to some extent so the high frequency signals from the GPU are being coupled through your motherboard or case into the DAC and out to your speakers/headphones.

On cheap motherboards I've heard noise through headphones when moving a USB mouse for example. Your noise could even be coupled through your monitor cable if it is poorly shielded (e.g. the high frequency LVDS coupled to the cable shield, causes noise on your chassis earth which is turn causes noise on your audio out of motherboard).

Coil whine is normal, a dedicated sound card will almost certainly cure your problem.

Thanks for the info, I knew why the noise was getting to my speakers (motherboard since the new one was much better than old one) just wan't sure about this coil whine... how come GTX 570 does not have it? do all the 780's have it?

edit: also I was thinking about insulating my speakers with transformers later on, I was just worried/disappointed about this coil whine that is causing all the noise ;/
post #7 of 11
not sure if a transformer is what you want, won't that block low frequencies at best (not your high frequency whine) and add more complications to your audio path? A ground loop isolator might help but I think a cheap sound card will almost certainly solve your issue and an external USB sound card or headphone DAC would be even better. For what it's worth that's my suggested route, you can get a reasonable card for about $20

Different cards exhibit different issues, the 780 runs at higher frequencies and has different signal paths, different isolating features etc etc so it's not really possible for me to give you a definitive answer. Not all 780s have coil wine and likewise not all 570s are absent from it, it's just luck of the draw really!
 
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post #8 of 11
I think the best way to definitely not have any interference in terms of audio is a USB DAC, definitely recommend that.

Your graphics card however, it's EVGA so if the coil whine is bothering you, register the card on the EVGA website (you'll need the serial number and proof of purchase), give them a call and ask it to be replaced due to really bad coil whine, that's one of the great things about EVGA. They replaced my coil whining 780Ti no problem smile.gif
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post #9 of 11
Thread Starter 
Quote:
Originally Posted by pharcycle View Post

...an external USB sound card or headphone DAC would be even better. For what it's worth that's my suggested route, you can get a reasonable card for about $20

I have tried a USB external card before (surround version of Sound Blaster... looked fancy and so was the price... however it had a really bad *pop* through the speakers whenever USB powered on (restart/booting up)
Quote:
Originally Posted by pharcycle View Post

it's just luck of the draw really!
yeah I don't like to gamble with $600, they should really have a disclaimer or offer the cards with whine for discounted price... I mean for the price and quality expected from an x80 series this is pretty bad..
Quote:
Originally Posted by Magical Eskimo View Post

I think the best way to definitely not have any interference in terms of audio is a USB DAC, definitely recommend that.

do you guys have any recommendations? Like I said this USB business had my speaker popping... I was looking at some high def USB external cards way back when I was running a car audio HU as my receiver with variable timing but that's all gone now... and the surround I have will bottle neck the sound quality
Quote:
Originally Posted by Magical Eskimo View Post

Your graphics card however, it's EVGA so if the coil whine is bothering you, register the card on the EVGA website (you'll need the serial number and proof of purchase), give them a call and ask it to be replaced due to really bad coil whine, that's one of the great things about EVGA. They replaced my coil whining 780Ti no problem smile.gif
now that's what I like to hear... I have heard a lot good things about EVGA and that's why I only buy their cards, I was just unsure if they would accept this reason for return...

Thank you guys for input and advice.
-now the only question left from OP- would this coil whine get worse with time? so far is borderline tolerable ... and would it shorten the lifespan of the GPU?
post #10 of 11
Coil Whine is not an indicator of present or impending damage, it is just the card under stress with you quite literally being able to hear it use electricity to get the job done. Most cards don't have noticeable coil whine, but all electronics whine when electricity runs through them.

BUT you have an EVGA card! Register that bad boy and get it replaced for bad coil whine!
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