nForce3-250: Which Boards Have On-Chip LAN?by Wesley Fink on August 6, 2004 12:05 AM EST
- Posted in
As we talked about in the launch review of the nForce3-250 chipset, the high-end versions of the nF3-250 feature nVidia on-chip LAN and nVidia Firewall built into the chip. Since the original chipset launch, it has been clear that readers were very confused about what the nVidia on-chip LAN actually was and which boards had the on-chip LAN.
We have been working with nVidia to try to provide some answers to your questions and clear up the confusion. This should make your buying decision a little easier when shopping for nForce3-250 motherboards.
What is nVidia On-Chip LAN?The Gigabit LAN capabilities on certain nForce3-250 chipsets is not really a fully integrated LAN. Like solutions in a few other chipsets that remove the LAN from the confines of the PCI bus, nVidia provides a port for direct communication of a Gigabit LAN PHY (Physical Layer) with the nForce3-250 family chipset. There is still an external Gigabit LAN chip providing PHY Gigabit LAN capabilities, which communicates directly with the nF3-250 chipset.
As a result, you cannot determine if an nVidia nForce3-250 family board has on-chip Gigabit LAN merely by looking at the specifications for other brand LAN chipsets. The on-chip LAN will still have an external Gigabit LAN chip providing PHY Gigabit capabilities. This makes the on-chip LAN more like a port to communicate with the external Gigabit LAN PHY than it is a fully integrated Gigabit LAN chip. The end results are the same however - removing the Gigabit LAN from the constraints of the slower PCI bus.
Do ALL nForce3-250 chipsets have On-Chip Gigabit LAN?The answer to this question has been spelled out in the chipset reviews for the various nForce3-250 family, but it is still a source of confusion. The ONLY nForce3-250 chipsets with on-chip Gigabit LAN are the nForce3-250Gb and the nForce3 Ultra. The other chipsets in the nForce3-250 family do not offer on-chip Gigabit LAN or nVidia on-chip Firewall.
This means that a motherboard based on the nForce3-250, without a Gb or Ultra extension, does not have the nVidia on-chip LAN or nVidia Firewall.