Umm I had connected this particular card via the 6pin-4pin molex adaptors that was included in the box. Now I changed it to better cables. I measured the voltage under load before and after I changed. The second connector actually had a lot lower voltage of 11.4v vs 11.6 with the new cable it is 12.05v on both connectors and the whine is almost gone.
I don't think it is the chokes because I can't see any of those in the area the whining seems to emanate(rear end, next to the 6pin connectors). I can only see four caps.
However as I'm not electronics guru would someone with more knowledge explain why the whine almost went away when the card got more juice while the load remained the same.
Topic: 79XX-coil whine. True or false? (Read 6037 times)
There are too many factors involved here. How loud the whine is, is relative, and also it greatly depends on the model of the video card. On a few of mine, it ranges from no noise at all, or barely audible. On others, there is obvious whine, to squealing. I also noticed that when the mining application stops, it also stops squealing.
Have you guys noticed any difference between miners? cgminer for one makes one of my 5870s whine quite audibly. phoenix not so much as a peep. There seems to be also a good 40w difference on power consumption. Yet the throughput seems largely unaffected. I run with water so not too much fan noise to cover the whine, but I bet one could hear this whine despite the fan noise of stock cooling!
So the real question is why don't the other cards whine? Does this have anything to do with too low voltage(11.6v measured from whining card's power cable connector)? Can my caps blow up?
There are too many factors involved here. How loud the whine is, is relative, and also it greatly depends on the model of the video card. On a few of mine, it ranges from no noise at all, or barely audible. On others, there is obvious whine, to squealing. I also noticed that when the mining application stops, it also stops squealing.
Have you guys noticed any difference between miners? cgminer for one makes one of my 5870s whine quite audibly. phoenix not so much as a peep. There seems to be also a good 40w difference on power consumption. Yet the throughput seems largely unaffected. I run with water so not too much fan noise to cover the whine, but I bet one could hear this whine despite the fan noise of stock cooling!
So the real question is why don't the other cards whine? Does this have anything to do with too low voltage(11.6v measured from whining card's power cable connector)? Can my caps blow up?
I have 3x 7970s on water-blocks and I can't hear a peep out of them.
Does anyone even know the science behind the coils whining? Why don't we ever hear of motherboards whining? Only GPU and PSUs.
The answer is right here:
To have coil whine you need a coil and those are in your PSU.
... I guess Graphics cards must also have them?
And here is an assortment of coils, large and small:
I haven't heard any, though I have put my ear up to the card to listen for it either. I have the dual fan sapphire 7970, and a PC Power & Cooling brand power supply.
Does anyone even know the science behind the coils whining? Why don't we ever hear of motherboards whining? Only GPU and PSUs.
The answer is right here:
To have coil whine you need a coil and those are in your PSU.
... I guess Graphics cards must also have them?
Does anyone even know the science behind the coils whining? Why don't we ever hear of motherboards whining? Only GPU and PSUs.
I had pretty bad coil whine on a brand new seasonic psu not too long ago. I contacted them and RMA'd the psu for a replacement which is totally silent. Their explanation: once in a while you get bad batches of coils, although this will not affect the use, it'll annoy the hell out of you.
Seems to be related to the quality of the coils each manufacturer uses.
Seems to be related to the quality of the coils each manufacturer uses.
There are too many factors involved here. How loud the whine is, is relative, and also it greatly depends on the model of the video card. On a few of mine, it ranges from no noise at all, or barely audible. On others, there is obvious whine, to squealing. I also noticed that when the mining application stops, it also stops squealing.
what people call coil whine is usually cap/inductor whine, and almost all video cards produce it if you put your ear close to them.
I think it was aimed at despoiler but whatever. For the record I had to look up coil whine myself.
legendary
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Reverse engineer from time to time
To have coil whine you need a coil and those are in your PSU.
Goes to show this guy doesn't know SHIT about computers.To have coil whine you need a coil and those are in your PSU.
Goes to show this guy doesn't know SHIT about computers.
Anyways, coil whine isn't harmful to your hardware. It's just an annoying sound. Deal with it (live with it or RMA)
Oh I know quite but about "computers" as it were. I think you'd be more precise to say electrical circuitry since obviously computers aren't the only type of electronic device.
I probably should have just said check your PSU because it's far more likely to be the source. I know my 7970 doesn't whine, but my PSU does on idle.
To have coil whine you need a coil and those are in your PSU.
Except not all PSUs have VRMs that use coils, nor are PSUs the only thing that use VRMs.
To have coil whine you need a coil and those are in your PSU.
Goes to show this guy doesn't know SHIT about computers.
Anyways, coil whine isn't harmful to your hardware. It's just an annoying sound. Deal with it (live with it or RMA)
Does this mean that something is wrong with the hardware or just annoying but nothing wrong ?
I have experienced this myself on 5870s. If I run furmark you can actually hear the GPU working and no, I am not insane.
Similar thing when watching a hardware accelerated video.
Is this a defect or just normal / annoying ?
I also noticed a bigger coil whine from my PSUs but I think that is normal because of the big transformers and whatnot inside.
Thanks !
I have experienced this myself on 5870s. If I run furmark you can actually hear the GPU working and no, I am not insane.
Similar thing when watching a hardware accelerated video.
Is this a defect or just normal / annoying ?
I also noticed a bigger coil whine from my PSUs but I think that is normal because of the big transformers and whatnot inside.
Thanks !
It is normal, just annoying if you can hear it. It comes from the windings in inductors and transformers vibrating. Sometimes if you can locate the offending coils dumping some superglue inside can reduce or eliminate the whine. I have an Nvidia 6600GT that makes PWM noises whenever the GPU is running in 3D mode. Has run for years without issue.
To have coil whine you need a coil and those are in your PSU.
Pretty much anything has inductors on it these days. Most gpus have several which are part of the switchmode power circuitry that buck the 12vdc input from the psu down to the 1.2v or so that the GPU core and memory need to operate. Motherboards have inductors for the same reason, bucking voltage down to the CPU vcore level.
I have a sapphire, visiontek and gigabyte 7970, two reference design blowfans, and the 3 fan windforce Gigabyte.. None have any whine that is audible to me over the fan noise, when clocked at 1070MHz, each slightly undervolted.
To have coil whine you need a coil and those are in your PSU.
Does this mean that something is wrong with the hardware or just annoying but nothing wrong ?
I have experienced this myself on 5870s. If I run furmark you can actually hear the GPU working and no, I am not insane.
Similar thing when watching a hardware accelerated video.
Is this a defect or just normal / annoying ?
I also noticed a bigger coil whine from my PSUs but I think that is normal because of the big transformers and whatnot inside.
Thanks !
I have experienced this myself on 5870s. If I run furmark you can actually hear the GPU working and no, I am not insane.
Similar thing when watching a hardware accelerated video.
Is this a defect or just normal / annoying ?
I also noticed a bigger coil whine from my PSUs but I think that is normal because of the big transformers and whatnot inside.
Thanks !
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