Give RivaTuner a try,
RivaTuner v2.22 download from Guru3D.com
Don't worry about any of the fan control or overclocking stuff (unless you really want too), and set it up with the hardware monitoring,
Vaguetech - Rivatuner v2.07-11 Guide
Once configured you can also set it to use its built-in OSD and keep track of things while gaming.