I have a MSI desktop motherboard in a 1U case with a gigabit chipset. I've had a few problems with it like the connection going out when you download a file from it (flow control and green mode was disabled along with TCP offload) but after changing a few settings it was fine.
Would getting an Intel NIC gigabit adapter change anything? If it reduced latency or increased speed, I would consider that a profitable benefit. I know that NICs are not necessary for server motherboards because they are top-quality to begin with but I am doubtful of desktop motherboard network chipsets.
Any input on this would be greatly appreciated. I am also looking at this