The newest 939 PCIe Nforce4's are certainly creating quite a buz, especially amongst the gaming community, they are possitively salivating over the SLI feature, two high end gaming cards working in tandem.
Obviously NF4 PCIe's come at a high cost and overall system performance is said to be no better than the standard 939 platform with either the Nforce3 250 or Via K8T880Pro chipsets.
Dual channel and increased Hyper transport speed of the newer 939 socket are definately advantages over the older 754.
Thats not to say 754's aren't any good, if you find a socket 754 CPU/Motherboard bundle at the right price then I would still recommend it but at the same price 939 wins hands down.
Either or: Via K8T880 Pro or Nvidia Nforce3 250, both are very evenly matched.
MSI K8 Neo2 Platinum MS-7025 won anandtech best 939 board in November.
PCIe: well if you are building from scratch and have the extra money but don't expect much differance in performance unless you are a hardcore gamer.
SLI: (two cards in tandem) said to give between 3 and 20% increase in graphics performance over a single card.
Martin
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