tand86

“His router is rated for 1gig, meaning it’ll do minimum that amount”

Uh, No? What are you on about lol.

I think you need to remember we are in /HomeNetworking and not /Networking. I am very aware that spec does not dictate hardware capability. I am very aware that you can run 10gig over cat 5 (and other various configs beyond the "spec") in certain cases. I am very aware that IPSs overprovision. What I am NOT aware of is anyone who has gone to best buy, purchased a modem and wifi-router with gigabit NICs, gone home to their gigabit ISP plan, plugged and played, and magically gotten 1.2Gbps to their client device. Simplifying for the purposes of home networking to say that given a standard Gig NIC > Cat whatever cable > Gig NIC negotiated at 1000Base-T will run ~940Mbps is perfectly valid, especially in the context of this post where the user has one data point showing 1.2Gbps, all other sites showing ~940Mbps, and his set up is what I described above. You are reading way to far into my (I'll agree here) aggressive use of the word "cant" and trying to apply it en masse to all possible situations. In the context of home networking, the OPs issue, and anyone else experiencing similar things, this is quite clearly a bad measurement or a bug. Also, I am not referring to data rates in the brochure. Go run some Iperf tests on the setup I described above and let me know what you get. Verizon does clearly say 940, but I suspect this is because they know when they drop off their ONT with a Gig interface, they know dam well its expected to be ~940Mbps on the top end. They didn't pull this number out of their ass.

Please explain.

His router has a 1 gig wan interface. This has nothing to do with over-provisioning.

The amount of times I see the word over-provisioned here is comical. Literally not related to what he is seeing. HIS ROUTER HAS A 1GIG WAN INTERFACE, it cannot and will not run at 1.2gbps lol.

Use a more reliable speed test site. The correct answer is you can’t, after some overhead a gigabit port caps out around 940mbps. Anything being reported over that is a bad measurement or a bug.