Benchmark: Power Consumption
6000-series cards are now available at bargain prices and they can offer better in-game performance for your pound, but they can also be more power hungry.
For HTPC environments, or small-form-factors in general, low power consumption can be a key ingredient and the Radeon HD 7750 is a good fit. System-wide power draw is very low when idle, and kept to around 90 Watts when playing Total War: Shogun 2.