CPUz and gpuz give info about your system and not performance of your hardware. Use traps to monitor your framerate. Then match the frame rates from any benchmarks.
Also no your CPU will not bottleneck you graphics card
You also need to be attentive to resolution and settings on these benchmark, as well as Nvidia and AMD performing better with certain settings and profiles. Name a game, settings, performace, what version drivers and cap profiles, and if nothing else you'll they're alot to it.