Model GA-7PESH3
Dual E5-2600 series CPUs. Up to 256GB RAM (8x32GB) @ 1600MHz. Supports quad SLI/Xfire both. Onboard 6Gb/s SAS.
PCIe slots 1,3,5 and 7 are x16
PCIe slots 2,4 and 6 are x8
I advise against using 32GB RAM modules since they are about $900 apiece