Asus Crosshair V Formula Motherboard Review

The Ninjalane 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: 4.50
Optimized: 2x
Max Support: 4x

NVidia SLI
AMD Crossfire

As indicated by the PCI Express layout chart there are a total of four 16x PCI Express slots on this motherboard with all four using bandwidth earmarked for video cards.  Slots two and six are the primary video card slots and run at a full 16x each when only a single card is installed.  Slots four and seven borrow bandwidth from the nearest primary slot when populated. 
 
For best video performance you will want to populate slots two and six with video cards.  For proper triple card configurations, using either nVidia SLI or AMD Crossfire, you'll populate slots two, four and six with video cards.  This will give you ample room for dual slot coolers and still remain within the confines of the standard ATX form factor specification.  

The Crosshair V Formula is optimized for dual and quad card configurations with a triple card configuration possible assuming that dual slot heatsinks are used.