I’ve got a “ASUS ROG Strix B550-F” which wasn’t exactly a high-end motherboard when I got it (I got it because it was cheap), but it’s got an Intel chip rather than a Realtek one. The lower-end motherboards have Realtek NICs but I usually don’t get the cheapest of anything since there’s usually a pretty big difference in quality if you spend just a little bit more.
The Intel I226-V chip on that motherboard is only $2.87 each (for quantities of 1000, even cheaper for large bulk orders) and the manufacturer can likely use the same PHY chip and timing components, so it doesn’t really increase the price a lot to use a non-Realtek chip.
I’ve got a “ASUS ROG Strix B550-F” which wasn’t exactly a high-end motherboard when I got it (I got it because it was cheap), but it’s got an Intel chip rather than a Realtek one. The lower-end motherboards have Realtek NICs but I usually don’t get the cheapest of anything since there’s usually a pretty big difference in quality if you spend just a little bit more.
The Intel I226-V chip on that motherboard is only $2.87 each (for quantities of 1000, even cheaper for large bulk orders) and the manufacturer can likely use the same PHY chip and timing components, so it doesn’t really increase the price a lot to use a non-Realtek chip.