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Nighthawk X4S Slow Download Speeds
My X4S AC3200 cable modem occasionally will have the download speeds slow to 1 mbps or less while the uploads remain normal at 35-40 mbps. I am paying for 400 mbps download speeds. You can restore ...
Ok hoping you or ISP and get it working better...
What model series modem do you have? AC3200 is a combined wireless speed, not a modem model.
It's a C7800v2
Be sure your using a good quality LAN cable between the modem and PC. CAT6 is recommended.
What is the connection rate seen on the PCs ethernet adapter. Should see 1000Mpbs
Please post a copy and paste of the modems connection status page.
Have the ISP check the signal and line quality UP to the modem. Be sure the ISP provisions the modem correctly.
Be sure there are no coax cable line splitters in the between the modem and ISP service box.
Be sure your using good quality RG6 coax cable up to the modem.
Be sure to power OFF the modem for 1 minute then back ON.
https://community.netgear.com/t5/Cable-Modems-Routers/General-info-and-Troubleshooting-for-Cable-Modems/m-p/1530376#M12853
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router?article=24311. Yes, we are using CAT6.
2. Connection rate is 1000 Mbps
3.
Apply Cancel Frequency start Value This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect. Starting Frequency <tabindex=-1>Startup Procedure</tabindex=-1>
Procedure Status Comment Acquire Downstream Channel 561000000 Hz Locked Connectivity State OK Operational Boot State OK Operational Security ENABLED BPI+ IP Provisioning Mode Honor MDD APM <tabindex=-1>Downstream Bonded Channels</tabindex=-1>
Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectabables 1 Locked QAM256 1 561000000 Hz -9.3 dBmV 35.9 dB 1 0 2 Locked QAM256 2 567000000 Hz -9.8 dBmV 35.7 dB 2 0 3 Locked QAM256 3 573000000 Hz -9.4 dBmV 36.0 dB 6 0 4 Locked QAM256 4 579000000 Hz -10.3 dBmV 35.5 dB 10 0 5 Locked QAM256 5 585000000 Hz -10.1 dBmV 35.6 dB 5 0 6 Locked QAM256 6 591000000 Hz -10.4 dBmV 35.7 dB 5 0 7 Locked QAM256 7 597000000 Hz -10.6 dBmV 35.5 dB 7 0 8 Locked QAM256 8 603000000 Hz -10.8 dBmV 35.2 dB 18 0 9 Locked QAM256 9 609000000 Hz -10.9 dBmV 35.3 dB 5 0 10 Locked QAM256 10 615000000 Hz -11.3 dBmV 35.0 dB 4 0 11 Locked QAM256 11 621000000 Hz -12.1 dBmV 34.7 dB 13 0 12 Locked QAM256 12 627000000 Hz -12.8 dBmV 34.5 dB 16 0 13 Locked QAM256 13 633000000 Hz -12.4 dBmV 34.7 dB 16 0 14 Locked QAM256 14 639000000 Hz -11.9 dBmV 34.8 dB 20 0 15 Locked QAM256 15 645000000 Hz -11.0 dBmV 35.1 dB 5 0 16 Locked QAM256 16 651000000 Hz -11.0 dBmV 35.0 dB 7 0 17 Locked QAM256 17 657000000 Hz -10.7 dBmV 35.1 dB 5 0 18 Locked QAM256 18 663000000 Hz -10.6 dBmV 35.2 dB 5 0 19 Locked QAM256 19 669000000 Hz -10.2 dBmV 35.2 dB 7 0 20 Locked QAM256 20 675000000 Hz -10.9 dBmV 35.0 dB 3 0 21 Locked QAM256 21 681000000 Hz -10.0 dBmV 35.3 dB 3 0 22 Locked QAM256 22 687000000 Hz -10.7 dBmV 35.2 dB 6 0 23 Locked QAM256 23 693000000 Hz -10.1 dBmV 35.3 dB 4 0 24 Locked QAM256 24 699000000 Hz -10.5 dBmV 35.3 dB 2 0 25 Locked QAM256 25 705000000 Hz -9.7 dBmV 35.3 dB 21697 62905 26 Locked QAM256 26 711000000 Hz -10.2 dBmV 35.2 dB 26128 67909 27 Locked QAM256 27 717000000 Hz -9.4 dBmV 35.4 dB 1 0 28 Locked QAM256 28 723000000 Hz -10.2 dBmV 35.1 dB 3 0 29 Locked QAM256 29 729000000 Hz -9.7 dBmV 35.2 dB 2 0 30 Locked QAM256 30 735000000 Hz -10.1 dBmV 35.2 dB 1 0 31 Locked QAM256 31 741000000 Hz -9.5 dBmV 35.2 dB 0 0 32 Not Locked Unknown 0 0 Hz 0.0 dBmV 0.0 dB 0 0 <tabindex=-1>Upstream Bonded Channels</tabindex=-1>
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power 1 Locked ATDMA 19 2560 Ksym/sec 25000000 Hz 50.5 dBmV 2 Locked ATDMA 17 5120 Ksym/sec 37500000 Hz 50.8 dBmV 3 Locked ATDMA 18 5120 Ksym/sec 30700000 Hz 50.8 dBmV 4 Locked ATDMA 20 2560 Ksym/sec 21400000 Hz 50.0 dBmV 5 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0 dBmV 6 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0 dBmV 7 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0 dBmV 8 Not Locked Unknown 0 0 Ksym/sec 0 Hz 0 dBmV <tabindex=-1>Downstream OFDM Channels</tabindex=-1>
Channel Channel ID Indicator Subcarrier Zero Frequency Active Subcarrier Number Range Total Codewords Uncorrectable Codewords 1 33 Primary 677600000 Hz 1588 ~ 2507 249864617 0 2 0 Other 0 Hz 0 ~ 0 0 0 <tabindex=-1>Upstream OFDMA Channels</tabindex=-1>
Channel UpstreamIsMuted Ranging Status Subcarrier Zero Frequency Active Subcarrier Number Range Symbols Per Frame Tx Power 1 Other 0 Hz 0 ~ 0 0 0 dBmV 2 Other 0 Hz 0 ~ 0 0 0 dBmV Current System Time: Tue, Aug 16, 2022 12:14:20
4.ISP has been out and has replaced coax beginning at the pole outside all the way into the house. (We had the inside coax replaced)
5. Signal quality has been checked and ISP provisioned modem correctly.
6. No splitters between modem and ISP service box.
7. All interior coax was replaced and new coax professionally installed.
8. Power off procedure has been followed.
You power levels are too LOW:
https://kb.netgear.com/24311/Power-level-guidelines-for-a-NETGEAR-cable-modem-router?article=2431
Also you have correct and un-correctables that should be zeros.
Check your coax fittings and ensure they are snug.
Have the ISP check for this and the power levels. The ISP will need to work with you on this.
Be sure to use Ooklas installable speed test app to test speeds with a wired PC. Ensure other devices are disconnected or not using bandwidth before testing.