It's taken NVIDIA a mighty long time to squeeze its Kepler GPU into something more affordable than the GTX 670, but it's finally happened -- the mid-range GTX 660 Ti is out and available to purchase for $299 on boards from EVGA, Gigabyte, ASUS and the usual suspects. Some buyers may complain that's $50 more than the 560 Ti, while others will no doubt be reeling off their CVV codes already. For its part, NVIDIA claims the 660 Ti is the "best card per watt ever made" and that