Antec is near synonymous with power supplies in the PC industry thanks to their track record of quality releases more often than not and new products. For a short while they took a while to ramp things up in the wattage department but now they're at the top with a 1,000W power supply. One of their most popular brands was the NeoHE brand of power supplies. These PSUs were known for their modular, shielded cabling, incredibly low noise, low heat, and amazing efficiency. Unfortunately they also topped out at 550W which might be questionable to run an SLI setup and especially a pair of Radeon 29000XT cards in Crossfire.