Today we're taking a look at Sapphire's Radeon R9 280X Toxic, the latest of the custom 280X cards to come rolling through our labs. With the Toxic series of cards Sapphire shoots high, and their 280X is no exception. Shipping with a factory overclock greater than any other 280X card, the 280X Toxic is the fastest of the 280X cards, which as we'll see has some very interesting performance and power consumption repercussions.