Powercolor r9 280x Turboduo coil whine

it is a coil whine issue(if when running the computer just in windows you hear no whining then this feedback I'm giving applies, only when loads are applied will you hear harmonics). I have many of these cards I had purchased for a lan center and every one of them makes this coil whine harmonic(Noted to not be a issue by PowerColor and AMD, rather just can be an annoyance if your PC does not have sufficient noise dampening). if you run 3dmark benchtest program you'll hear very high frequency harmonic hissing when the 1500fps scenes kick in. regular scenes of up to 150fps have the lower harmonic hissing coil whine. I've contacted powercolor and they are aware of the issue and notified me it is a audible only issue. no performance or life-span issues. Not sure if they would RMA your card but since I am a large purchaser, they are willing to take back every card and put a fix on them that was disclosed by AMD to manufactures if I wish to do so. I was just concerned that it may be a performance issue but it is not.

"We apologize for the issue that you are faced with. We realize that you are a very valuable customer. Please be aware that the choke that we use is the one suggested by AMD. The solution that we have to fix the Coil Whine, is to use the adhesive (advised by amd) to reduce the coil whine..." - RMA/Tech support Dept.

However I'm still having powercolor investigate if my cards had the fix via serial number check or not since I don't want to ship back 40 cards and find out they already had the fix applied and the sound is the best it'll be. They should be able to match up the serial numbers manufacturing date and the date that they started doing the fix for all new cards and or RMA'd cards when AMD told them of the resolution.

FYI this shipment was a shipment that came directly from suppliers which had purchased a large quantity from powercolor and I received it in late February of 2014. I didn't realize the sound was louder than I expected since I didnt use the cards in my business till 2 months ago when prepping the PCs. I'm not sure when the AMD patch/fix came out so I am awaiting that reply as I would think my cards should have already had that fix seeing as they are fairly recently manufactured cards.

Also all my systems use corsair ax1200i psu's. So you're getting an answer from someone who's spent a lot on quality hardware and knows what they're talking about. All cards tested on multiple ax1200i psu's and professional surge protected clean power input.

Again it is only a audible annoyance, no performance or life span issues can be correlated to the noise I am told by powercolor/AMD. Of course it is annoying still if your case isn't sufficiently noise dampened.

I have 6 asus directCU II 280x OC editions that are a year old and don't make a peep (i heard an extremely faint whine but my ear was literally touching the video card to hear it) during 1300-1500fps scenes or any scenes.

I've outfitted my PC's with some noise dampening foam which has eliminated the noise on most games. But again all games my customers play tend to be in the 35-100fps range so the harmonics arent too loud to begin with, and no game yet has peaked above 200fps (in game menus tend to hit 200fps) so benchtests like 3d mark are irrelevant and don't really portray a normal condition of how a video card should perform. Tests like unigine trinity/valley and furmark are good example test programs that can benchtest video cards for performance.