I guess long before Computex all AMD 990X motherboards will have leaked onto the web. Here's the first one from ASUS called the ASUS M5A99X EVO, an upcoming Socket AM3+ motherboard for AMD's Zambezi processors. The motherboard has twop x16 PCIe slots and as announced by NVIDIA, will carry SLI support albeit in a 8:8 PCIe lane configuration.
The AM3+ Black socket is powered by 8-phase Digi+ VRM, cooled by a large heatsink that sits next to the northbridge heatsink.
We see six SATA 6 Gb/s ports from the SB950 southbridge and a another controller drives two additional SATA 6 Gb/s internal ports. Techpowerup reports that Other connectivity features include at least two USB 3.0 controllers made by ASMedia (ASUS subsidiary), two internal USB 3.0 ports by header (for front-panel or bracket), and probably two more ports on the rear panel. There's Realtek-made 8-channel HD audio, a gigabit Ethernet connection, and VIA-made FireWire controller.
AMD FX-Series processors natively support DDR3-1866 MHz memory standard, there are four DDR3 memory slots wired to the socket, support dual-channel memory. Click the thumbnail.