lol, some pcb if you bake them for about 10 mins @ 200c or 400f, will fix them. something to do w/ the solder and the heat which is at the brink before solder liquefies. all I know my card is back to normal after artifacting severely and it stopped producing a pic. only do this if your card has no warranty rma option(s). if you do and still have warranty it might void the warranty or manufacturer will claim abuse by user.
Just take off all oem heatsinks/fans and tim. clean really good, only pcb and bracket (some take them off), I bake mine upside down, others do it right side up, on a cookie sheet, I lined mine w/ aluminum foil. youube has a lot of vids of people baking. Do at your own risk. give it about 30mins - 1hr for cool down.
NB update, its idling @ 52c stock speeds, sigh, I still have a bit of cure time to go, we'll see then