Originally Posted by Dasboogieman
Ok finally fixed the second of the major Sapphire Tri X design flaws.
(The first being lack of integrated backplate to cool VRMs and the usage of rare M1.5 screws which preclude the use of aftermarket backplates with the Tri X cooler)
I don't know if anybody with a Tri-X has noticed, at specific fan speeds (mine were at 47% 50% 55% 60%), you get this rhythmic rattling sound. Mine was more of a pulsating buzz. The noise goes away completely at higher or lower fan speeds of >70% or <30%. The noise also can come on when the fan quickly ramps speed (e.g. steep fan curves)
Now normally, this buzz isn't a problem if the fans are loud but it is extremely prominent due to the sheer silence of the Tri X design.
I first thought the issue was caused by the VRMs, so I opened up the cooler and placed a small square of Sekisui 5760 on each choke. The coil buzz definitely went away but the rattling remained. I next thought it may be due to shoddy fans so I opened up an RMA with Sapphire. While waiting for the RMA ticket, I happened upon this youtube video.http://www.youtube.com/watch?v=EomL1oysVXs
So I got some garden rubber gloves from Bunnings, cut them up in to rectangles and placed them so that the fan frame would not contact the HS anymore. Not only has the rattling speed gone away, the fan transitions are now buttery smooth and the whole assembly even sounds slightly less loud at full speed.
Basically, this issue is a design flaw where there is a lack of padding between the Fan assembly and the HS assembly leading to resonance of the metal.
Thought would be worth posting for anyone with a Tri-X, try this mod and the VRM mod before RMAing the card.