This is what a PUMA6 intel chipset modem does to your latency, This causes jitter in games voice chat and virtual meetings. This is a major issue to quality of service. Using
DOCSIS 3.1 - Making Gigabit Cable Networks a Reality
Intel® Puma™ 7 Development Kit
Intel Coughs to Puma CPU Flaw that Hit Virgin Media Hub 3 Router UPDATE - ISPreview UK