With the full specifications listed as well as details about the stunning new design of the card and cooler, the GTX 690 is without a doubt going to be the fastest graphics card on the market when it goes on sale next month.
The GeForce GTX 690 4GB card is based on a pair of GK104 chips, each sporting 1536 CUDA cores, basically identical to the ones used in the GeForce GTX 680 2GB cards released in March. The base clock speed of these parts is slightly lower at 915 MHz but the "typical" Boost clock is set as high as 1019 MHz, pushing it pretty close to the performance of the single GPU solutions. With a total of 3072 processing cores, the GTX 690 will have insane amounts of compute horsepower.
Each GPU will have access to 2GB of independent frame buffer still running at 6 Gbps, for a grand total of 4GB on the card.