The SR-X comes with two LGA 2011 sockets (it supports Sandy Bridge-E CPUs for single-processor setups and Sandy Bridge-EP CPUs for dual-chip configurations), 12 DDR3 memory slots (up to 96 GB of RAM are supported), two (one 8-pin and one 6-pin) power connectors per CPU, six SATA and four SAS (Serial Attached SCSI) ports, seven PCI-Express 3.0 x16 slots (SLI and CrossFireX support is included), PCIe disable switches, voltage read points, a debug LED, dual Gigabit Ethernet, two eSATA ports, 7.1 channel audio, Bluetooth, EVBot support, and six USB 3.0 connectors (four on the back plate, two via a header).
EVGA is promising more details about the SR-X 'soon'.