@everyone: thnx for replying
A coworker asked me if there was such a tool and I wondered why I did not thought of that before. I only wanted more consumption for overclocking.
I have 2 systems: a desktop E6800 with 8800GTX and an ALienware with HD 3750 crossfire .
The ATI may use the ATI PowerPlay™ power management technology.
So the riva tuner is a ATI Powerplay equivalent for Nividia Cards?