Just this week the XFX HD5850 I purchased for a mate decided to pass away, rather untimely considering it was only purchased in May.
I've tested the card in three computers (including the system it was originally installed in) and all pointed to the card being faulty.
The system specs of the machine it was working in are:
Intel Core i5 750,
4GB of Kingston PC16000 DDR3,
Coolermaster GX 750 psu,
a Western Digital 500GB HDD,
and a CM Storm 'Sniper' case.
What I want to know however, is reguarding the back of the card. On the PCB, around where the GPU's componants have been soldered on, there is a grayish-white residue that has appeared there some time between when I installed it, and when it died. This residue, is reasonably easy to wipe away, and I'm not sure if this is some kind of residue left over form the manufacturing process, that only became aparent after the card has been running, or wether it is something else entirely.
The main thing is, I have no idea if this has anything to do with the cause of the card's demise.
So any ideas what I'm looking at here? Thanks in advance for any help.
(I've attached the best picture I could get of the back of the PCB... it's kinda hard to see, but there are two big portions of the substance in the photograph...)