ASROCK X79 EXTREME4 Intel X79, S 2011, DDR3, SATA III - 6Gb/s, SATA RAID, PCIe 3.0 (x16), ATX

Supports Intel SKT2011 Processors
Supports Quad Channel DDR3 800, 1066, 1333, 1600, 2400+ (O.C)
4x DDR3 DIMM Memory Slot
Max. Supports up to 32GB Memory
Chipset: X79
Expansion Slots:
2 x PCI (32 bit)
2 x PCIe 2.0 x1
3 x PCIe 3.0 x16
Supports Crossfire / SLi
1 x 10/100/1000 (LAN)
1 x 7.1 Audio I/O
1 x Clear CMOS switch
1 x eSATA 6Gb/s
1 x Firewire (6pin)
1 x PS/2 Keyboard
1 x PS/2 Mouse
1 x SPDIF Out (Coaxial)
1 x SPDIF Out (Optical)
6 x USB 2.0
2 x USB 3.0

GIGABYTE X79-UD3 Intel X79, S 2011, DDR3, SATA III - 6Gb/s, SATA RAID, PCIe 3.0 (x16), ATX

Support for Intel Socket 2011
X79 Chipset
XL-ATX Form Factor (305x 244)
PCI Express Gen3 Support
4x PCI-E 3.0 x16 slots (X16, X16, X8, X8)
1x PCI slot
2x PCI-E x1 slots
Memory Supported: DDR3 Quad Channel 2133/2000/1600/1333
/1066/800
Memory Socket: DDR3 4x
USB ports: 4x USB 3.0 (F2, B2), x14 USB 2.0 (F6, B8)
SATA 6GB/s ports: 6
SATA 3GB/s ports: 4
eSATA 3GB/s ports: 2
RAID: RAID 0/1/5/10
Audio: ALC889 W/Dolby
LAN: 1x GbE LAN Intel
BIOS: Dual UEFI