Is an Ethernet Card recommended?

[Kengaroo]

I'm building a new computer and trying to figure out if an Ethernet card is worth it? I have a gig internet speed. I plan on buying a z270 board. I assume they support 1 gig right? I just wanted to make sure before purchase.

[lloose]

Try reading the specs of the board, it'll tell you what kind of Ethernet is built in. If it doesn't support gigabit connections then pick up a card that does.

I can't think of a single motherboard onboard NIC that doesn't have gigabit ethernet. I doubt anything with a 10/100 NIC onboard would support a cpu that could handle wow anyways.

[lockblock]

On top of what everyone else is saying I'd recommend getting a board that includes either an Intel or Broadcom nic opposed to Realtek or Qualcom.

[Low Hanging Fruit]

It really depends on what you are doing. If you are gaming you won't see much of a difference if any. If you are editting 4k video over a network from a remote/central server you might get a little noticable difference on your workstation.

Just food for thought.