Slow Download Bandwidth with WZR-HP-G300NH

[boiler1993]

I am using a WZR-HP-G300NH router with DD-WRT (build 16783).  I recently switched from AT&T DSL to Charter HSI, using the same router.  When using Charter (modem is Cisco DPC3010), connected through the router, the download bandwidth is approximately 25% of the download bandwidth of a connection direct from the modem to the PC.  When using AT&T, the download bandwidth of the router connection was the same as a direct modem connection to the PC.  Connection to the router via wire or wireless, yields the same results.

 

I have tried numerous changes to settings, with the same results.  Most settings are the factory default.

 

Are there any suggestions?

[yaktwok]

After trolling around the forums the last couple days, I've read that the "user friendly" firmware provides potential speed improvements and range. I haven't tested it out it but it might be worth a shot.

[buddee]

Does the modem (not the router) happen to have a gigabit port on it?

[boiler1993]

Per the manual (Cisco DPC3010):  "Includes bridged Gigabit Ethernet (GigE) and 10/100BASE-T auto-sensing/auto-MDIX Ethernet ports. Some models also include a USB 2.0 data port for high-speed data services to other devices?."