I would go X48..considering you will need 16x16x
|We’ll start with the top of the range, the Intel P45 Express. Intel’s chipset names have carried the “Express” moniker ever since support for PCI Express was added, but now that it’s the de-facto baseline standard for a motherboard to offer some form of PCI Express capability, the added meaning is a little empty. What isn’t empty, however, is the new chipset’s PCI Express 2.0 capability, which may be configured in a single 16-lane interface, or two 8-lane interfaces, for tandem graphics processing.
|The rest of the chipset design should be very familiar: PCI Express 2.0 support in the form of 32 lanes, integrated DDR3 and DDR2 memory controllers and a pairing up with the Intel ICH9 south bridge. The south bridge offers up the rest of the main feature set including support for six SATA ports with RAID options, a dozen USB channels, integrated 8-channel audio and a handful of PCIe 1.0 lanes for accessory support.
I tried to find more info on X48.. basically it supports RAID_10, 32x PCI-E lanes, Intel XMP memory profiles and 1600mhz FSB. There will much more bandwidth for 2x gpu's with more pci-e lanes.
-So far, I really like the mobo I have, over my P5K3-DLX. I have managed a 480mhz FSB with my Q6600 so far..planning on breaking through 500 soon.