Why bother with three- and four-GPU rendering? Current state of play. What's the point? CrossFireX covers all of ATI's multi-GPU shenanigans under one branding, and naturally includes two-, three, and ...
For the last fourteen years, AMD and Nvidia have both supported multi-GPU configurations. Initially, these types of systems were limited to two GPUs using either Nvidia's SLI technology (the acronym ...
A video of the performance of two amd HD6990's running Dual crossfire (4 GPUS). taken from the full review.