The SBG8300 is a modem/router gateway, not a stand alone modem. You should not use it with another router unless you have the gateway in bridge mode or the router in AP mode. What speed do you get wired via ethernet to the SBG8300?
42 Down / 33 Up
Test with a computer connected via ethernet direct to the 8300, and no other devices connected. Boot the computer in safe mode with networking and then www.speedtest.net and then test at speedtest.googlefiber.net and see how they compare.
For clarity if anyone views this in the future:
- Gigablast is advertised as 940 Mbps
- I am seeing 35-42 Mbps download speed.
- The upload speed is within the realm of what is advertised.
Download speed is about 4% of the advertised speed and not 33.33% as indicated by the initial post.
Sounds like your in DOSCIS 2.0 mode or something. Do you see all 32 channels listed when you look at your signal levels? See here for instructions.
Also, you said your "Device network adapter capability" is 867Mbps. Is that a wireless spec? Do you have a gigabit NIC?
I do see all 32 channels. Upstream QAM Power Levels (dBmV) for all frequencies are in the 40-42 range at a Symbolic rate of 5120 KSym/sec. Modulation is 64QAM for all and all have active lock status.
The site linked above indicates acceptable upstream power levels should 45 dBmV to 51 dBmv. Could this be the issue?
Hardware:
Computer 1
Network adapter for WAN is Intel(R) Wi-Fi 6 AX201 160MHz (2.4 Gbps). Network adapter for the ethernet cable is Intel I219-LM (1GbE).
Computer 2
Qualcomm Atheros QCA9377 which is rated for a peak speed of 433 Mbps.
Additional information:
1 - Modem is in bridge mode
2 - Hardwire to router yields 290Mbps
3 - Wifi yields 50-70 Mbps
4 - Hardwire to router yields 250 Mbps
5 - Hardwire to modem when not in bridge mode yields 250 Mbps
Thank you for all of the great comments and questions.
