GEFORCE GT 640 is the first model based on the Kepler architecture, which instead of the GK104 GPU used the GK107. The GK107 chip area, containing 1,3 billion transistors, is 118 mm², which is significantly smaller than the GK104's 294 mm2.
The GTX 650 provides almost all the capabilities of the older solutions of the GeForce GTX 600 line in games and is quite capable of showing an acceptable level of performance even in modern DirectX 11 games in the most common resolution of 1920x1080 at medium and sometimes high settings.
Although the GeForce GTX 660 has a lower price and power compared to top-end video cards, there is still too much of a gap between them and budget GK107-based boards, which is being filled by the recently announced GeForce GTX 650 Ti video card.
Immediately after the release of the GeForce GTX 680, many users began to wait for the release of less powerful and expensive options, like the well-known GeForce GTX 460 and GTX 560. But NVIDIA was in no hurry to release anything based on the new chips, only based on the top-end GK104...
After the recent launch of the GeForce GTX 680, NVIDIA is introducing a video card based on the Kepler architecture (you can read more about this architecture in the GeForce GTX 680 review) with two GK104 processors. The release of the GeForce GTX 690 can be called a huge step in the direction of dual-chip solutions, because... Thanks to the latest manufacturing technologies and the new Kepler architecture, the GeForce GTX 690 includes two full-fledged video chips.
Compared to previous NVIDIA cards that occupied the niche of the GeForce GTX 660 Ti, it finds itself in a unique position. Both the GeForce GTX 460 and GTX 560 Ti were based on GF114 chips, while the GTX 480 and GTX 580 used GF100 and GF110 processors with a significantly larger number of computing units.
The GeForce GTX 670 model is designed for those gamers who plan to run the most demanding 3D applications with maximum settings, at high separate screen resolutions and with full-screen anti-aliasing enabled. Those who want to get all the functionality of the older GTX 680 video card, but for a lower price.
NVIDIA GPU Kepler architecture was built from the ground up not only for maximum performance in the latest DirectX 11-ready games, but also for optimal performance per watt. The new structure of the streaming multiprocessor is twice as efficient as the structure of multiprocessors of the previous generation, and the new geometry engine builds triangles twice as fast.
