Well how can you be sure that SpeedFan caused that? I've said it was working well,even after I changed the fan speeds, till I turned on the machine next day.
hmmm...
Before the day that this happened, I used a program called SpeenFan on Windows 7. I changed the fan speed. I don't know what I did.....
then you stop using the card, so you know that the card is the problem.
It sounds likely, at least. Besides, just looking at one of those (see thumbnail below), those fans look like they are rather important Don't you think? Messing with them using 3rd party software is not particularly recommended, and usually voids the warranty (I wonder why - oh, because they break).
I admit, stating that SpeedFan WAS the cause may be a little presumptious of me...
If you can tell us what the actual cause was, then please enlighten us, for the benefit of others who have this issue - otherwise this thread serves as a good warning to others about some of the dangers of playing with 3rd party tweaking tools...
whether it was the cause or otherwise.