TPU has details about the ASUS ROG Rampage IV Formula and Rampage IV Gene, you can read it over here.
Press shots and presentation slides of the Rampage IV Formula started making waves today. Pictures reveal the board to be standard ATX. Unlike the Extreme, Formula has just four DDR3 DIMM slots (one slot per memory channel), yet it supports all the DRAM multipliers Extreme does. The CPU is powered by a 11-phase Digi+ VRM. It is wired to four PCI-Express 3.0 (capable) x16 slots, among which two are PCI-Express 3.0 x16 capable, and all four are x8 capable, depending on the way they are populated with addon cards. Apart from these long slots, there are two PCI-E 2.0 x1. 4-way SLI and CrossFireX are supported. Storage connectivity includes four SATA 3 Gb/s (black), four SATA 6 Gb/s (red, two from the PCH, two from third-party controller), and two eSATA 6 Gb/s (also from a third-party controller).