Temperature sensors - weird readings.

[Mr. S]

I'm a bit confused about one of the sensors in my new computer. It's actually showing that something is getting hotter really, really fast. However, i don't know what it is.

(Purple graph, first picture.)

After 3 benchmark sessions in F1 2011, it's looking like this.

(Khaki graph - purple graph is staying down.)

Any ideas?

Edit #1: the khaki graph is apparently the GTX680, confirmed by SpeedFan. Now for the purple one...