Slow internet speeds when not plugging directly into modem?

A few points,

For either Ethernet or WiFi, the connection speed will always negotiate to the speed of the slowest device.

For example, a super fast 1000 Mbps wireless ac router can only connect to a wireless g laptop at a maximum of 54 Mbps. Remember, this is the speed of the WLAN connection between your WiFi device and the router, not the Internet speed.

No router or connection type will change your Internet speed. This connection bandwidth is shared among all of the users of your LAN. So any bandwidth others are using will be deducted from the total Internet (WAN) bandwidth that is available to you. When you connect directly to the modem, you have exclusive use of the connection and will receive all of the bandwidth.

For example, If you have a 10 Mbps Internet connection and one user is utilizing 5 Mbps of the bandwidth to stream a HD Netflix movie https://support.netflix.com/en/node/306 then you only have 5 Mbps left of your 10 Mbps connection for all of the rest of the users on your network to share.

As far as wireless connections go,

Wireless signals are affected by many factors including distance, wall density, electrical interference, directional antenna range, etc.

All of these factors will affect your actual wireless range. As wireless connection quality varies the connection speeds are renegotiated. The connection may start at 300 Mbps and end up at less than 20 Mbps or drop entirely. Note: This is the connection speed between your device and the router and not the Internet speed.

Try this,

Do a speed test http://speedtest.net/ with a computer directly connected to the modem via Ethernet.

Next, Turn off the WiFi on the Linksys EA6900 and disconnect all LAN connections. Connect the modem to the WAN port on the router.

Now do a power cycle,

- Unplug power from both the modem and router,

- Power up the modem and wait several minutes to fully establish a Internet connection.

- Power up the router.

Connect the same computer to one of the router's LAN ports and retest the speeds. The Linksys EA6900 has Gigabit LAN ports, so there should be little difference in speed between the direct modem connection and the exclusive LAN connection. If there is, it could be a firmware issue. http://support.linksys.com/en-us/support/routers/E... or faulty hardware.

Good Luck...

Yeah, the router you have has problems. Take it back, get a cheaper router, it'll likely do better.

I often end up posting the same question on other sites

Can you provide more details?