I took my 2 Gigabyte HD 7950's out of my case to remove dust etc, when I noticed on the back there was a discolouration/residue on the cards. Now naturally it has me worried, as these cards are out of warrenty and I was planning on selling them soon.
Both cards have been used for heavy gaming in crossfire and have stayed well with in their temprature limits (65-85 degrees celcius)
Anyone have an idea with whats happening or what it is?
If its sort of "bubbling" or sort of dry and "crisp" than it could just be the coating on the PCB coming off of the back. I have a Gigabyte 6850 that I am currently using and I noticed the same thing when I transferred cases a year ago. I have noticed no adverse effects thus far...
Since Both cards have the build up in the same areas, I initially was thinking that it may have been a condensation issue, where contact or close contact was being made with the fan housing or a plate. So I went to look for some more visuals of the Gigabyte HD 7950, but found the following PDF instead.(it's old, but may apply)
May also be a result from reactants left on the boards from their manufacturing process. Again, I take the leap on that possibility because of the uniformity and similarity of the buildup on both cards.
(if those images are of the same card, then ignore this post completely please)