No, you can't have a bad motherboard. It's a hardware component, not an abstract concept.
No, you can't have a bad motherboard. It's a hardware component, not an abstract concept.
It was my first encounter with this, but I’ll rely on a professional. Wikipedia also supports this (besides the Gig reference; it appears to apply only to the metric prefix), which bolsters your argument. Indeed, that seems to make the most sense.
Did you receive the cable-provided modem or did you purchase your own device?
No? Your connection is 1Gb, the router is 1Gb, but because Wi-Fi and cable aren't perfectly accurate, it's not exactly 1Gb. You should check if your speed is actually lower and reach out to your ISP for clarification.