"As we just mentioned, while the GeForce GTX 260 Black Edition may look like a standard reference board in terms of its cooling solution, things begin to look very different once you take a look at clock speeds, with this part offering some big boosts to clocks across the board. Starting out with the Black Edition's core clock, the reference clock speed of 576MHz is ditched in favour of a 666MHz clock (yes, that's right, they did go there) to make a 90MHz increase in speed. Together with this, shader clock speed also gets a big increase of 162MHz, up to 1404MHz from 1242MHz. Lastly, the board's GDDR3 memory gets an impressive increase from 999MHz up to 1150MHz to make for a 151MHz gain."