I like to know why this Powerplay was never mentioned? like Cool'nQuiet GPU?

Radeon 7500 Mobility M7 GPU Operating at 270 MHz @ 1.5V
“For the Mobility Radeon 7500, Powerplay provides dynamic voltage and frequency modulation, which reduces power consumption.>>>>
the Mobility Radeon 7500 shuts down all of the unused sections of the chip and cranks the clock speed down to 66MHz at 1.2 volts (which is more than enough for DVD playback), resulting in less power draw. “
http://www.tomshardware.com/mobile/...eon7500-03.html

new one like Mobility™ Radeon® X700
PowerPlay™ 5.0
http://www.ati.com/buy/onboard/mobi...radeonx700.html