MSI is the first partner to announce a factory overclocked HD 4870 X2 card, the R4870X2-T2D2G-OC. The card uses ATI's reference design but the GPU clocks have been overclocked from the reference 750MHz to 780MHz.

MSI will also have a reference clocked version, but it will also be the first partner to carry an overclocked HD 4870 X2 card. Unlike the GPU, which is overclocked by 30MHz, the memory on this overclocked card will remain at reference 3,600MHz. The R4870X2-T2D2G-OC is cooled by the same reference cooler, but it is nice to know that there is still some room for overclocking this graphics behemoth.

The rest of the specifications are basically the same with every partner as the only thing that keeps changing is the sticker on the cooler and the bundle that comes with the card.  You can check out MSI's HD 4870 X2 sticker on the picture below.