Sapphire on Friday launched what it said is the fastest video card on Earth. Its TOXIC Radeon X1950 XTX with liquid cooling is one of the few video cards available that ships with a built-in water cooling system. The reduced heat gives Sapphire the room to improve the speed of the already-fast Radeon X1950 chip by delivering the new TOXIC board from the factory with a core overclocked from 650 to 700MHz and the 512MB of GDDR4 memory overclocked to an effective 2GHz. Owners can also choose whether to prioritize performance or silence in the cooling system: the built-in fan can operate either at full speed to cool the system further during gaming and unofficial overclocking, or else throttle back to generate virtually no noise in a standard case. Sapphire is releasing the new card in both a regular and multi-card CrossFire Edition next week for $549.