NVIDIA GeForce Power Efficiency: From The 6600GT "NV43" To The GTX 750 Ti "Maxwell"
With the popular open-source, cross-platform Xonotic first person shooter, the GeForce GTX 750 Ti was twelve times faster than the 6600GT.
The GM107 Maxwell GPU continued representing a huge generational leap in power efficiency for NVIDIA when compared to earlier generations of mid-range graphics hardware.
Some Xonotic ultra image quality settings results for reference...