ATI's new CrossFire Multi-VPU technology was scrutinized by AnandTech today, just like dozens of other big hardware review sites did. ATI's CrossFire does roughly the same as NVIDIA's SLI, it allows users to connect two PCI Express graphics cards:

In many ways, ATI's CrossFire launch parallels NVIDIA's SLI launch. ATI is bringing together the launch of a graphics technology and a motherboard platform to support it. Motherboards will support 2 x16 PCI Express slots for two cards. These cards will be linked together, and one will send its data to the other for final compositing and display. Some of the same multi GPU rendering modes are implemented as well.



Link: AnandTech