why is the wifi speed on my 6ghz band so much slower than expected on my new devices? i have a gigabit connection

Diagnosis

The performance drop on the 6GHz band of the Nest WiFi Pro is primarily due to "attenuation," which is the rapid loss of signal strength as the wave passes through physical obstacles. Unlike 2.4GHz (which penetrates walls) or 5GHz (which balances range and speed), 6GHz waves are extremely short. Even a single interior wall or a piece of heavy furniture can trigger a "rate shift," where the router and device automatically drop to a lower Modulation and Coding Scheme (MCS) index to prevent the connection from dropping entirely. This results in a massive plunge in throughput, even if the device still shows "full bars." Furthermore, the Nest WiFi Pro utilizes a "unified SSID" (one network name for all bands). If your device is positioned in a spot where the 6GHz signal is borderline, the system may struggle to decide whether to keep the device on 6GHz or steer it back to 5GHz. This "band steering" oscillation can cause momentary latency spikes and a perceived drop in speed. You can confirm this by running a speed test while standing three feet from the primary router; if the speeds jump to near-gigabit levels, the issue is signal penetration and placement, not your ISP or hardware failure.

How to Fix It

To maximize 6GHz throughput, you must optimize the physical topology of your 3-pack system and ensure the devices are utilizing the correct protocols. Follow these steps:

1. Relocate the Primary Node: Place the main Nest WiFi Pro node in an open area, elevated at least 3-5 feet off the ground. Avoid placing it inside a media console or behind a television, as the 6GHz signal cannot penetrate metal or dense plastic chassis.
2. Optimize Point Placement: Place your two secondary points no more than 25-30 feet away from the primary node. While the system supports longer ranges, 6GHz backhaul and client connectivity degrade sharply after 30 feet. Ensure there are no more than two standard drywall walls between any two nodes.
3. Verify Device Compatibility: Ensure your client device (e.g., Pixel 7/8, Samsung S23/24, or Intel AX211 card) has the latest driver or OS update. Specifically, check that "6GHz Band" is enabled in the device's advanced wireless adapter settings if using Windows 11.
4. Perform a Network Refresh: Open the Google Home app, navigate to Wi-Fi > Network settings > Advanced networking. Toggle the "IPv6" setting off and then back on to refresh the DHCP lease and routing tables for the 6E band.
5. Test the "Line of Sight": Move your device to the same room as the node. If the speed reaches 600-900 Mbps, your hardware is functioning correctly, and the issue is the physical layout of your home.

If That Didn't Work

• Check for DFS Interference: Although 6GHz is less prone to DFS (Dynamic Frequency Selection) than 5GHz, local interference from other 6E routers in dense apartment complexes can cause channel overlapping. Try a full system restart via the Google Home app to force the Nest Pro to scan for a cleaner 6GHz channel.
• Disable "Video Conferencing" Priority: In the Google Home app, check if "Priority Device" is active for a specific machine. Sometimes the QoS (Quality of Service) engine throttles other 6GHz devices to ensure a stable stream for the priority device, which can cap your raw speed tests.
• Update Firmware: Ensure your nodes are running the latest version. Google frequently releases "stability patches" for the 6E radio that improve the hand-off between 5GHz and 6GHz. Check this in Wi-Fi > Devices > Node Details.
• Swap the Ethernet Cable: Ensure the cable connecting your Modem to the primary Nest WiFi Pro is at least Cat5e or Cat6. A degraded Cat5 cable will cap your entire network at 100Mbps, making the 6GHz band feel slow regardless of signal strength.

Heads Up

• The 6GHz Trade-off: Accept that 6GHz is designed for "Same-Room" high-performance gaming and VR. It is not a replacement for the coverage provided by 5GHz.
• Avoid Over-Saturation: Do not add more than 3 nodes in a small area. Too many nodes can cause "co-channel interference," where the 6GHz radios compete with each other, actually lowering your total speed.
• Heat Management: Ensure the nodes have breathing room. The 6E radio generates significant heat; if the node throttles due to temperature, the 6GHz band is usually the first to experience speed drops.