Yeah i had this happen to me, not sure what it was, thought it was ocean waves at one point.. 

I wonder if it's a bug in the latest release of Precision, since none of the reviewers mentioned anything like this.

I've got this problem with my Evga 1080 FE. I suspect the problem is widespread. Hopefully it's an easy bios or driver fix that happens in the next few days, otherwise I'm going to have to return the card for refund. I suspect this is going to be a huge problem for nvidia once a lot more people actually get the cards this week.
 
Run Valley with sound clicked off and it's easy to hear the problem, and monitoring with fan speed and fan tach confirms it.

7 pages worth on GeForce.com and growing.  Most feel that it is a bios problem on the card.  Precision, nor Afterburner does anything to help.
 
https://forums.geforce.com/default/topic/938256/geforce-1000-series/gtx-1080-founders-edition-fan-issue-/

If you were like me and thought your card did not have this issue please turn off some of your other fans and take off your headphones while gaming and you will see.  I have this issue too gents.. Card is going from 1400 rpm to 3000 like if it was a heartbeat.
 
 
 

Let's wait and see what EVGA has in their pockets to resolve Nvidia's fan problem.

Same problem here. Card: EVGA GTX 1080 Founders Edition. But i noticed, that when i tested a game (1 - 1 1/2 hrs, without PrecisionX) all seemed fine. Then with PrecisionX in the background, i had the fan issue too.
I have taken a screenshot of the precisionX monitoring (fan speed) - you can see that the fan is spinning (shortly) up to 3000 rpm like every 20 - 30 sec.

Post the screenshot later, im at work currently ;)

I hope its not an hardware issue and can be fixed with an bios update/maybe precisionX update, because the card itself is great.
 

 
EDIT: Uploaded image.
In the marked (red) area you can see the fan "waves" (3000 rpm peak) - and it sounds like the ocean, too - amazing ;-)
(Still need to check if the fan does this without PrecisionX in the background)

Makes you wonder if the issue will cross over into the custom cards as well.  Especially if it IS the fan controller. 

Precision, Afterburner, (and GPU-Z?) show the fan tachometer feedback shoot up and ramp down but DO NOT show the fan speed % (input to the card) changing. This means that the card is doing it even though nothing is telling it to do it. I am afraid that it sounds like a hardware issue with either the fan controller or the FET/circuitry in the fan. We shall see. Not looking too good though. Hopefully they are able to truely fix the problem with a BIOS update or driver fix and not just fudge a hardware problem with a crappy software solution.

ty_ger07
Precision, Afterburner, (and GPU-Z?) show the fan tachometer feedback shoot up and ramp down but DO NOT show the fan speed % (input to the card) changing. This means that the card is doing it even though nothing is telling it to do it. I am afraid that it sounds like a hardware issue with either the fan controller or the FET/circuitry in the fan. We shall see. Not looking too good though. Hopefully they are able to truely fix the problem with a BIOS update or driver fix and not just fudge a hardware problem with a crappy software solution.

This makes sense but like you hope there is an actual real solution.  I bought 2 of these and they will come tomorrow, so I shall see if I have the same issue.  I normally have a pretty aggressive fan curve on my cards so perhaps it won't be as bad.  I assume that the fan controller/circuitry is on the board itself so not an easy fix.
 
I am fairly confident that EVGA will take care of it's card buyers.  If the issue cannot be easily fixed then it would come down to returning it for a refund; getting a working replacement or some other compensatory means to help with this. 
 
Here's hoping for the easy quick fix.  Normally I wait to purchase but I got caught up in the hype train.  :)  The cards performance itself from what I read is unaffected by this.  Time will tell but the quicker they can resolve this the better for everyone.

mpoffo

ty_ger07
Precision, Afterburner, (and GPU-Z?) show the fan tachometer feedback shoot up and ramp down but DO NOT show the fan speed % (input to the card) changing. This means that the card is doing it even though nothing is telling it to do it. I am afraid that it sounds like a hardware issue with either the fan controller or the FET/circuitry in the fan. We shall see. Not looking too good though. Hopefully they are able to truely fix the problem with a BIOS update or driver fix and not just fudge a hardware problem with a crappy software solution.

This makes sense but like you hope there is an actual real solution.  I bought 2 of these and they will come tomorrow, so I shall see if I have the same issue.  I normally have a pretty aggressive fan curve on my cards so perhaps it won't be as bad.  I assume that the fan controller/circuitry is on the board itself so not an easy fix.
 
I am fairly confident that EVGA will take care of it's card buyers.  If the issue cannot be easily fixed then it would come down to returning it for a refund; getting a working replacement or some other compensatory means to help with this. 
 
Here's hoping for the easy quick fix.  Normally I wait to purchase but I got caught up in the hype train.  :)  The cards performance itself from what I read is unaffected by this.  Time will tell but the quicker they can resolve this the better for everyone.

Supposedly the fans do it even with fan curves on Precision and Afterburner.  Somehow...whatever is causing is over-riding it.  Correct...performance is NOT effected.

https://forums.geforce.com/default/topic/938975/geforce-1000-series/geforce-gtx-1080-founder-issue-fan-issue-please-share-system-info/post/4891890/#4891890
 
Manuel said they were able to reproduce and that they are working with software team to investigate this.

Sajin

mpoffo
https://forums.geforce.com/default/topic/938975/geforce-1000-series/geforce-gtx-1080-founder-issue-fan-issue-please-share-system-info/post/4891890/#4891890
 
Manuel said they were able to reproduce and that they are working with software team to investigate this.

Now lets see them report that it's a hardware issue. 

I really hope it's not a hardware issue. I don't want to RMA my card back for a refund, but I will if it's not fixable with bios or driver updates.

GNielson

Sajin

mpoffo
https://forums.geforce.com/default/topic/938975/geforce-1000-series/geforce-gtx-1080-founder-issue-fan-issue-please-share-system-info/post/4891890/#4891890
 
Manuel said they were able to reproduce and that they are working with software team to investigate this.

Now lets see them report that it's a hardware issue. 

I really hope it's not a hardware issue. I don't want to RMA my card back for a refund, but I will if it's not fixable with bios or driver updates.

I don't want to RMA my card, too - i hope it is not an hardware issue, that would suck =/ (The card itself runs really nice, and it's the first card since a long time that has like no coil-whine)
I knew what i was doing by buying a brand new product, but it came out the right time and i simply couldnt resist - right after my experiment with a [GPU of another brand] failed ;p
 
 

Zuhl3156

Sajin
Glad I didn't buy any of these.

Yeah, me too. Even with a GTX-1080 FE at 2.1 GHz, my GTX-980 SLI still beats the Firestrike score so I'm not worried at all.

+1