The MPower series will become available on both socket LGA1155 and socket LGA2011, the X79 MPower. From the looks of the motheboards are upgraded models Z77A-GD65 and X79A-GD65 (8D) yet with a stronger CPU VRM, more friendly warranties and a new black+yellow color-scheme, which is consistent with that of its Lightning series graphics cards (such as the R7970 Lightning). Here's the skinny from TPU (we're not at Computex this year as a few weeks ago I had surgery):

The Z77 MPower packs a 16-phase CPU VRM, which is stronger than that of the Z77A-GD80. The board draws power from a 6-pin PCIe power connector, apart from the usual 24-pin ATX and 8-pin EPS, which adds electric stability to deal with high-power graphics cards. The VRM is backed by several diagnostic LEDs, and voltage measurement points. The expansion slot arrangement is carried over from the Z77A-GD65, with three PCI-Express 3.0 x16 (x8/x4/x4-capable), and four PCI-Express 2.0 x1. Its connectivity is augmented with 802.11 b/g/n WLAN and Bluetooth. Apart from these, the Z77 MPower is largely identical to the Z77A-GD65.

Next up is the X79 MPower, MSI's latest socket LGA2011 motherboard. The X79 MPower packs a 9+2 phase CPU VRM, which draws power from two 8-pin EPS connectors. In terms of OC-friendly features and options it is largely similar to the Z77 MPower. Barring two additional SATA 6 Gb/s ports, 802.11 b/g/n, and Bluetooth, the X79 MPower is largely identical to the X79A-GD65 (8D). From these, one can deduce that the Z77 MPower will be priced somewhere between the Z77A-GD65 and Z77A-GD80 (which will be priced high due to its expensive Thunderbolt controller), while the X79 MPower will be priced between the X79A-GD65 (8D) and Big Bang XPower II (which is costlier due to a heavier package).