PSU electrical noises

[Dark Mantis]

I have exactly the same PSU and they are brilliant (and 7 Years Warranty) and they don't make any noise. You should be able to turn on C1E as well if you want to.

[Trinitrotoluene]

I can confirm that I cant hear any noises with my new PSU Corsair HX850    http://www.prisjakt.nu/bilder/bild.php?p=433869&type=standard&size=800&.jpg

I run with a cpu volt nonauto and C1E off but EIST on

Glad to hear that, I have just filled in RMA for my current PSU and want to have it replaced with the Corsair HX850 as well. Will keep you guys up to date on how that one performs with my hardware. Hopefully the RMA department will find the same problem I ran into.

[Trinitrotoluene]

I was able to test my new HX850 today as well, as my new memory arrived today. But things just got weirder, the sound is still there! It doesn't seem to be coming from the PSU anymore though. This time it's coming from the CPU socket area, I'm quite sure. I have to say at a certain point you stop trusting your ears, like colorblindness.

HDtune benchmark: definately audible sound
windows/bios idle: none

Haven't tested anything else, but I assume the sound will also pop up from other types of load being thrown at the CPU/PSU/board.

Right now, it's still just an annoyance factor (though I didn't pay 200 euros to have some funky business going on with my board...). I will try to use the system as much as possible. Should I try to fiddle around a bit with C1E/EIST, this is not quite clear to me. Or perhaps contact Gigabyte and have them to look at the board and fix it the proper way, for once and for all.
I mean, having RMA'd two kits of memory and a PSU, lets throw in the board itself as well!


And a happy note: not dissapointed with the new PSU at all!

[Dark Mantis]

I know exactly what you mean about not trusting your own ears any more. The best thing is to get a small cardboard or plastic tube and use that put to one ear to try and pinpoint the origin of the noise. Works suprisingly well.

I expect the noise is coming form the CPU area and is probably the coils. There is a hardware fix available now and you can arrange an RMA for the board to have it done.
The C1E, EIST etc fix is ok but it does mean that you are running your CPU at full speed all the time and I am unsure if it would work in your case anyway as your board seems to make more noise when loaded.

The PSUs are very good aren't they?

[Trinitrotoluene]

Good to hear the problem has been acknowledged and that Gigabyte has my back, if necessary, for a fix!

I've just fixed (instead of auto) the CPU vCore to the normal 1.23125v value in the bios and when benchmarking HDtune, I hear the deafening sound of nothingness. No more coil whine. We're still talking HDtune here, as that has always been the major amplifier here. Maybe the VERY slightest "idle" whine sound, but if so, it is absolutely VERY low volume and it doesn't have the same tone, not a tone at all. Might be too early to call it, but at least it's an interesting detail. I don't know if energy saving stuff that's on the board also slightly varies the vCore like it does to the clock frequency?

Will definitely get back to this when I have something more conclusive, thanks again! I think I can live with this if it stays this way. I hope all this info might prove useful to other UD3R users as well.

[Dark Mantis]

I don't know if energy saving stuff that's on the board also slightly varies the vCore like it does to the clock frequency?

Yes as far as I am aware it does alter the voltage as well so that could be why it varies with load or it could just be the fluctuation of frequency.

[Trinitrotoluene]

Right! Thanks again, will keep this and the other thread up to date.