Maximum PC: The Mayan calendar tells us the end of the world is nigh (wait until you see what Google has in store), but that didn't stop Sapphire from launching another graphics card. If the world really does come to an end tomorrow, the 'Sapphire HD 7870 XT with Boost' will be the company's last product ever released, and on paper, it doesn't look like a bad way to be remembered.