Briefly returning to the M5A99X EVO - powered by an AMD 990X/SB950 combo - the above slide declares that SLI support will indeed be present. This won't be the case however, with the AMD 970/SB950 powered M5A97 EVO, M5A97 PRO and M5A97 models - even though NVIDIA's extension of SLI support to the AMD 900-series platform, does include the 970 chipset.
As for the flagship AMD 990FX chipset, it looks like ASUS is going premium-only with the TUF SABERTOOTH 990FX and ROG Crosshair V Formula.
The TUF SABERTOOTH model goes for an 8+2 phase Digi+ VRM, and as you'd expect, comes with a hearty complement of PCIe slots. Akin to its ROG sibling, it will support CrossFireX and SLI configurations. ASUS' mix of military-standard components - and its TUF CeraM!X cooling solution - will also be included. Expect six SATA 6Gbps and two SATA 3Gbps ports, together with eSATA connectivity, and a medley of USB 2.0 and 3.0 ports to boot.
The ROG Crosshair V Formula goes with an 8+2 phase Extreme Engine Digi+ VRM and a large dose of ROG features for overclocking exploits. There's also mention of ROG ThunderBolt (not to be confused with Intel's Thunderbolt technology) for selected models, and across the board, it's seven SATA 6Gbps ports and a bucket-load of other connectivity options to top things off.