"So far, ASUS has released two motherboards based on the new AMD 990FX chipset, the Crosshair V Formula and the Sabertooth 990FX. Both have similar specifications and feature four PCI Express x16 slots, but the Crosshair V Formula comes with a better audio codec, two additional USB 3.0 ports, better networking chip, and more overclocking options. Let's check out the top-of-the-line socket AM3+ motherboard from ASUS."
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips