I just got an nvidia 6800 gt used from a guy and he added an artic cooling silencer to it, better than the stock one, as Iread on the sticky. I was checking my nvidia display settings and found Temperature settings? Is that whatmy card tempearature is at? IT shows : GPU core temperature: 62 C ambient temperature: 42 C If that's high or it's the current card temperature, is it good? normal? can I overclock it?