Less than a month ago Nvidia launched the GeForce GTX 660 Ti, making the new Kepler architecture available for around £239. Today the GeForce 600 series arrived, with a pricetag of £179. Nvidia is positioning the Geforce GTX 660 directly against the AMD Radeon HD 7870, and the graphics card manufacturer also informed us that the GeForce GTX 650 is around the corner. Hardware.Info tested the GTX 660 to find out how well it performs.
With a name like GeForce GTX 660 you almost expect it to be a less powerful version of the GeForce GTX 660 Ti, but that's not at all the case. The GTX 660 Ti was based on the same GK104 GPU that was used for the GeForce GTX 680 and 670, except that the number of cores was reduced from 1,536 to 1344 and the memory bandwidth was lowered from 256-bit to 192-bit.
The GTX 660 (without the Ti suffix) is based on a new GPU called the GK106. It has 2.54 billion transistors, making it 30 percent smaller and therefore cheaper to produce. This GK106 has 960 Cuda cores divided over five SMX units, which in their turn make up three GPCs. In terms of processing power the GK106 is 5/8 as powerful as the GK104. The GK106 has a 192-bit GDDR5 memory controller.
The remaining features of the GK106 are identical to those of the GK108 chip, including TXAA, Adaptive V-Sync, 3D Vision Surround en NVENC. We won't cover these again, please read our GeForce GTX 680 review for in-depth descriptions.
ASUS and Zotac sent us two GTX 660 card, which allowed us to test an SLI configuration as well.