This is absolutely so, and that is why some of my computers are using the Onboard NIC and some have additional PCI NIC.
I do not think that this type of question (relating to the Original Question at the top) has to do with Technology. It is more of a Psychological Sate inflicted upon us from the Computer Enthusiastic Historical Start of OverClocking and Video frame pushing.
If I was Mr. Somnus I would start using the Onboard NIC and be happy, but he is probably concern that he is going to miss something if he is not using PCI NIC.
Well Network is different than the OverClocking business, if the Network works correctly you do not miss any thing. A more expensive sophisticated PCI Card is Not better in a sense that a Video card is better (I.e. Makes you a better Killer in war games) , it better in a sense that it can do things that the Onboard NIC can not do. However if you do not need these functions (usually they are related to a much larger Cooperate Networks), you are not going to benefit from adding a simple PCI card.
P.S. Look at the picture of the SMC Card. The symbol on the Chipset is the Realtek Logo.
Link to:
SMC 1244TX.
:sun: