TechPowerUp posted a review on the AMD Radeon RX 480 CrossFire
A quote from the article:
In their marketing leading up to the Polaris launch today, AMD showed two Radeon RX 480 cards running in CrossFire, beating NVIDIA's GeForce GTX 1080 - at a much lower price point. We have a review of two of these cards running 16 games at 4 resolutions in CrossFire.AMD Radeon RX 480 CrossFire @ techPowerUp