Program to monitor temperatures of a gtx 465 video card?

i have a pny gtx 465 video card that i would like to monitor temperature in. i think my card has been acting a bit funny lately and wish to monitor temperatures to make sure its not overheating. does nvidia make a such program? if not, is there an accurate program that will?|||I am not sure if nVidia has a temp monitor program, but GPU-Z and RivaTuner both should provide GPU temps. It seems that RivaTuner provides more accurate results.