From a performance perspective, the most visible characteristic of the new chip is that Nvidia achieved a significant boost in speed without going overboard with clock speed. The 7800 GTX received a modest increase over the GeForce 6800 Ultra, ending up at 430 MHz. Much of the performance increase instead is attributed to more pipelines which now stand at eight vertex shaders and 24 pixel pipes. As the previous generation, GTX boards come with a 256 Mbit GDDR3 memory interface for a total of 256 MB of memory that is now clocked at 600 MHz. The cards will be available only in PCI Express versions, offer SLI capability and outputs for DVI and HDTV. Power consumption remains at about 100 watts, according to Nvidia.