With the X99S MPower, MSI has a rather interesting motherboard in its portfolio, since there are features relevant for overclockers as well as gamers. For overclockers there is for example a very good power design and gamers will love the beefed-up audio as well as quite a bunch of other features.
With the launch of the X99 chipset also MSI is amongst the select motherboard makers, which have a complete line-up ready at launch day. The X99S MPower is their high-end overclocking offer and therefore it comes with a lot of features.