For those who're questioning about 4-Way SLI, as long as the board can support up to 4 cards @ 8x PCI-E, it'll be able to support 4-way SLI with GTX400 series. But you'll still need the 4-way SLI dongle (is it provided?). I don't think it needs any BIOS update to support 4-way.

But 4-way is always pointless unless you have the money to burn.