Club Overclocker published a VisionTek Radeon HD 4870 512MB CrossFireX review.

Quote from the review: "I always love it when new items come into the market. Nothing is better than new CPU's or new Video cards to get people excited about computers. It's especially exciting when the two largest gaming video card manufacturers release new products within a week of each other. The last few weeks have been very exciting ones with all sorts of video card reviews popping up all over the net. Forums have been flooded with new ammunition for the long debate; which video card is better?
I don't think it's possible to answer that question and I'm not going to try. I'm just going to add more benchmark fuel to the fire and let you make up your own mind."
Read the full review on Club Overclocker.