MSI B85M Gaming Motherboard Review

The Hardware Asylum Multi-GPU index is a portable set of data we can use to determine the multi-GPU potential of any motherboard.  A higher index number indicates a favorable condition for multiple graphics cards while a lower number indicates a hindrance in one of our leading indicators.  Since the Index is not dependent on system architecture it can be applied to any motherboard regardless of processor or chipset generations.

Index: 2.5
Optimized: 2x
Max Support: 2x

AMD Crossfire

This motherboard will support two graphics cards and is optimized for dual card operation provided your case is not a limiting factor.  

For best video performance you will want to populate the top PCI Express slot with your video card and try to avoid using the secondary slot.  The secondary slot is in fact hardwired to 8x PCI Express lanes and only active if it is populated.  Given the distance between the slots if you choose to enable Crossfire be sure that your bridge connector is long enough to reach.