It's been over six months since Nvidia launched its Kepler architecture and we've finally seen the GTX 600 series enter more affordable price brackets, delivering a greater value every step of the way. In August, the company shipped its GK104-based GeForce GTX 660 Ti for $300, which was about 13% slower than the $400 GTX 670 while being roughly 33% cheaper -- an unmatched performance-to- price ratio at the time.

We watched a rerun of that episode only a few short weeks later when Nvidia elbowed its way into the sub-$300 market. The company's GK106-based GTX 660 launched at $230, landing right between AMD's mid-range offerings. In addition to being only 14% slower and 23% cheaper than the GTX 660 Ti, the GTX 660 offered more value than the Radeon HD 7870 while matching the 7850's price-to-performance ratio.

Having attacked the mid-range and upper-end markets, Nvidia has its sights set on the sub-$200 range, unleashing its GTX 650 Ti. At $150, the new arrival is roughly 34% cheaper than last month's GTX 660 and about 7% pricier than the Radeon HD 7770, which fetches around $140 depending on features and rebates.