Nforce 680i is the fastest one and it is meant for hard-core enthusiasts. EVGA should be first to market with this board, based on Nvidia reference design. The board supports old Pentium Ds 775, Pentium 4, Celeron D, Intel Core 2 Duo and Kentsfield.
It should be the best motherboard on the market for overclocking, leaving Intel's own P965 in the overclocking dust. It has 2x16 SLI slots, and a third PCIe slot. It supports SLI-ready memory and if you have the right Corsair slices you should be able to hit 1200MHz but it officially supports 800MHz. It sports Link Boost marchitecture, first Packet stuff, two Gigabit LAN cards, Mediashield with Raid 5 marchitecture and six SATA II ports.
The Nforce 650i SLI has 2x8 SLI ports and is for performance gamers. It works with all the CPUs, same as 680i, but doesn't have the third PCIe graphic slot. It supports DDR 2 800 memory, one Gigabit LAN, no Linkboost marchitecture and no dual net and four SATA 3.0 GB/s.
Last up is the Nforce 650i Ultra with the same specs as 650 SLI but without the SLI option. The 680i boards comes from EVGA in early November, Asus in late November, XFX, BFG, Foxconn and ECS inbetween. A second batch comes in January 2007 with Gigabyte, MSI, DFI and Abit on the list.
Nforce 650i SLI should come in December from Asus, and in January from Gigabyte, Abit, MSI and Jetway. Nforce 650i Ultra comes in December from Asus and MSI.
Corsair, OCZ, Kingston and Crucial are listed as the EPP memory suppliers of choice for this board; Cooler master and Sliverstone as the case of choice for SLI and Zalman and Danger Dan for cooling the stuff. Corsair Twin2X2048-9600C5 should be the fastest memory for it and should be able to hit the magical 1200MHz. Corsair holds the first five places and then come the OCZ that can pull off 1066 with OCZ2N100662KG and OCZ2N10661G. µ
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