I own a graphics card SAPPHIRE R9 280X, and I noticed a difference of functioning of its fans compared with moment or I bought it. During my first few uses for my gaming sessions, the 3 fans span.However I noticed that now it is not anymore the case. The only one starts, and when my graphics card increase in temperature (83°C) and that the first one is in big activity (70%),the second starts up, reduces the activity of the first one and lowers the temperature in 70°C. But the 3rd does not start anymore. I do not know when this change took place, how can I make a test to know if the 3rd ventilator ( the one in the middle) works ? And is it normal that the temperature increase so high before the launch of the second ventilator?
Thanks you in advance.