Features -
In the current market motherboard (and indeed almost all component) performance is very close. The days of a large performance advantage between boards using the same chipset are long gone. That is unless someone makes a HUGE mistake (like runs traces completely wrong). Now, the thing that differentiates different products is the features. These are things like power management, extra slots, better audio CODECs etc. It is these items that R&D teams work so hard to drop into what are really identical pieces of hardware at their most basic level.
There are not many real features on the Z8NA-D6C, but then again it is a work product and not a consumer offering. As a workstation/server motherboard the design, construction and performance are much more important over the type of features you would find on a consumer board, even an enthusiast product.
Now we are not saying that the Z8NA-D6C is without features; there are items like the optional MIMO audio card, the Dual Intel 82574L LAN chips, the ASPEED video processor, and a few other server support features that are embedded in the BIOS. We will cover some of them when we cover the BIOS. One feature that cannot be overlooked is the small size of the Z8NA-D6C. It can fit in a standard ATX card without the need to alter it in anyway. This gives a rather large amount of flexibility when it comes to your build choices.