dustinhunt78 :
Here ya go! Tells you everything you need to know.
http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0CC4QFjAB&url=http%3A%2F%2Fwww.overclock.net%2Ft%2F1229915%2Fhow-to-cpu-and-gpu-usage-along-with-fps-in-game&ei=QBQlU97MH8bl0QGlsoCQBA&usg=AFQjCNG1kND7iRlOqrZdu8Y0XAvuy2vH9w&bvm=bv.62922401,d.dmQ
The very first step in that guide voids the OPs designated rule of "without downloading a program".
@OP, You cant really. You'll have to download,at the very least,
GPU-Z