Gigabyte GA-K8NF-9 vs K8NXP-9
AnandTech - Gigabyte GA-K8NF-9 WARNING!!!. Talk about arcane version models. The K8NXP-9 is the fast version of the nForce4 Ultra chipset while the GA-K8NF-9 is the budget board built on the budget nVidia nForce4 4x chipset not the nForce4 Ultra chipset.
What this means is that the 4x chipsets won't overclock at all while the Ultras will. So don't get this board even though its shipping now. You want the as yet unavailable K8NXP-9 or the K8NXP-9 SLI.