Thanks Ken. While technically true, most decent interfaces in 2019 have latency that is basically negligible, unless you have a driver problem or a problem with your computer. And if you monitor using the headphone jack in the interface, you can effectively have zero-latency monitoring. If you do have a few milliseconds of latency that becomes noticeable, it is quick and easy to fix that in the multitrack software (DAW). That would be my suggestion. It seems more expensive and involved to try to hook up external sound cards directly to your motherboard. I actually did that back around 2003, before USB interface units were so good and affordable. Never looked back.