Why Renting Your ISP's Modem Is Costing You Speed and Money

The Monthly Tax You Are Paying for Inferior Hardware

At $14/month for a rental modem, you pay $168/year to use equipment that is typically 2–3 hardware generations behind what you can buy for $100–$150. By month 12, you have paid more in rental fees than a purchased modem costs — and will continue paying the rental fee forever.

What We Found in Testing

• ISP Gateway (Comcast XB7) — Download: 786 Mbps average
• Owned Modem + Asus Router — Download: 964 Mbps average
• Difference: +22.6% faster with owned equipment on the same Gigabit plan.

• ISP Gateway — Loaded Ping (Bufferbloat): Spiked to 210ms under load
• Owned Modem + Asus Router (with SQM enabled): Stayed at 18ms under load
• Difference: 11× better bufferbloat performance — transformative for gaming and calls.

Why ISP Gateways Underperform

1. Outdated chipsets: ISPs deploy modem hardware in massive volumes and keep using the same models for 5–7 years. Your rented equipment may use a chipset designed in 2019.
2. Disabled features: ISPs lock out advanced features (custom QoS, VPN server, traffic monitoring) from their firmware to prevent support calls. You cannot optimize a locked device.
3. No SQM/QoS control: The ISP gateway's QoS cannot be tuned properly, leading to the severe bufferbloat we measured.

What to Buy to Replace It

For Comcast/Xfinity plans up to 1 Gbps: Motorola MB8600 or Arris SB8200 (~$100, DOCSIS 3.1). Pair with any quality WiFi 6 router. You save $168/year in rental fees, recoup hardware cost in 12 months, and get meaningfully better performance from day one.