TweakTown posted a review on the OCZ EvoStream 600-watt SLI PSU

As far as the numbers are concerned, the EvoStream 600 is designed to handle a continuous load of 600 watts. It makes use of four 12v rails, each of which are rated at 15A. While this isn't the beefiest setup on the block, it will be sufficient for all but the most hardcore systems. Our test system runs a pair of hungry video cards and no issues were noted even under load.

OCZ EvoStream 600-watt SLI PSU using Modular Design