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Solution to Buzzing AMD 6990 (coil whine), Inductor Issue.

post #1 of 7
Thread Starter 
Now firstly a great thumbs up to fluxlite for this article found HERE that helped me get the following solution below.

Excellent Article Mr Fluxlite!

HERE IS MY SOLUTION to the AMD 6990 Buzzing problem.

I generated a solution from the info you provided as well as other related articles I have found around loads of forums.

I have had an identical "buzzing" problem with my Sapphire branded AMD 6990, when-ever certain GPU intensive games/apps are run my card generates a very distinct low frequency buzzing as demonstrated on another article I found, see here .

As recommended by many users of different graphics cards a dowsing of the marked inductors in your post with clear nail polish rectified my issue immediately. See below for exact area and instructions.
488.

I as mentioned below, injected the polish through the fan without removing anything and thus not voiding any warranties, beneath the marked area in the picture above is the same area with the housing of the 6990 removed marked in the picture below that you will be injecting the polish onto.
253

DO AT OWN RISK!!!

Now my card was still within its warranty period but I was to impatient to RMA the bad boy so this is what I did. Also personally I "injected" the polish through the fan blades in-between the two inductors with a hypodermic needle and syringe for better accuracy but as the solvent in the polish evaporates anyway so it would not really matter if you misdirected a few drops but the precision helps.

ALSO LET THE POLISH DRY FOR AT LEAST TWO TO THREE HOURS OR YOU MAY FRY THE CARD, SOLVENT = CONDUCTIVE, SO GIVE IT TIME TO DRY EFFECTIVELY!!!

Now admittedly I made the above mistake. I applied the polish and did not let it dry properly and my PC booted with a Graphics Card Failure POST beep sequence (LONG BEEP followed by THREE SHORT BEEPS) but I left it to dry and after two hours it was perfectly fine but be warned I was lucky and also too impatient and wanted to see results of my efforts:D.

METHOD

You will need:

Nail Polish (clear)
Buzzing AMD 6990
Syringe with optional needle.

Step 1

Fill the Needle and Syringe with the clear Nail Polish

388

Step 2 Insert Needle/Syringe head between fan blades and center motor housing between the inductors.

278

And inject liberal amounts of nail polish immediatly next to and in between the two inductors ( I used the roughly 2/3 of a small bottle of the stuff) and then let the card dry somewhere for at least a few hours (next to a fan worked very well for me), you can tell when it is dry as the smell of the solvent will have disappeared.

Personally the buzz was still present with my card but reduced in volume by about 90% and I will probably inject a bit more nail polish later on.

Anyway hope this helps, message or comment on this if you need help or have suggestions
Edited by NorBdelta - 2/21/12 at 8:04am
post #2 of 7
Hot glue from a glue gun. That or some type of silicon. The choke whine is caused by high freq vibrations and while it is not going to hard the card it is quite annoying. The theory behind the solution is that any substance that will leave a residue will dampen or absorb the vibration. This hot glue trick is more used for whinning motherboard chokes but i dont see why it cant work on graphics cards.
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post #3 of 7
Thread Starter 
Glue or silicon would work just as well but the access to the two inductors it to small and I did not wish to risk getting any on the fan scroll which would unbalance it. The nail polish is much easier to inject from what I have found and is easy to remove if it is accidentally misdirected.

I did try a hot glue gun bit without removing the fan and assembly it would get everywhere, even worse when I attempted to inject silicon from a gun.

So unless you have a very long thin nozzle for either a hot glue gun or a silicon gun I would recommend my method.

Cheers for the info though.
post #4 of 7
most manufacturers will still hold warranty on graphics cards if the heatsink was removed providing that the reason for RMA was not caused by any physical damage to components. say like EVGA and XFX, they still hold warranty if you have had water cooling blocks on their cards as long as the card is sent to them with the stock heatsink on for RMA
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post #5 of 7
Bit late for me since I sold my 6990,lol. But thanks for the info, It always annoyed me and I wanted a fix. I might end up buying another anyway if the new gen GPU prices stay so stupid.
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post #6 of 7
Buzzing is normal and is non-indicative of any sort of defect or fault. I suppose you can hot glue it if you want, but the fact you were even considering an RMA puzzles me OP. Tech vendors must get really pissed off at people RMAing stuff like this, ie stuff that isn't even broken or faulty.

On an unrelated note the 6990 pcb is sexy
post #7 of 7
It is pretty common for graphics cards to make whinning. But yea if i was incharge of the warranty department of Gigabyte or XFX and got graphics cards coming back because they make noise during benchmarks or something stupid i would get pretty annoyed and make the owner pay the return shipping for his card. What i dont get is the HD6990 is a pretty hot card, so in heavy use shouldnt the card's fan be so loud that you cant hear the whine anyway?
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