The one sitting atop of the mountain these days is ATI, and with their DX11-capable 5800 series graphics cards, they've blown everything else off the peak and into the wasteland below. We've seen a few of these cards up close and have come away extremely impressed. But today's examination is a bit different, with a rare treat: two 5870 GPUs packed onto one board, producing essentially top Crossfire performance on a single card.

In an evolution of its predecessor, the 4870 X2, today we look at the Sapphire Radeon HD 5970 OC.  Yes, it has a new naming scheme. And yes, it is an overclocked version. For those who cannot satisfy their hunger for performance, this Sapphire card features software to let you tweak the voltages to push your overclock to the limit; no volt modding required, no voided warranty.

The Sapphire Radeon HD 5970 OC is an absolute behemoth, from its gaming horsepower, to its size, weight, cooling technology, and price tag. It is big, it is brash, and and it is entirely unapologetic.

Let's take a look at the fastest gaming card on the planet.

Thanks go to our friends at Sapphire for providing the Radeon 5970 OC for this review.

Pioneers in a new era of how data is displayed and games are played, Sapphire shepherds the performance oriented with ground-breaking solutions to an environment that remains in a constant state of flux and ultimate evolution. For over ten years Sapphire has held true to its unwavering commitment, the commitment to deliver the most feature rich and soundly engineered products.