Wikipedia:Reference desk/Archives/Computing/2024 February 24

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February 24

Upload 8K 60 fps Coaxial cable

Does it 8K 60 FPS upload Coaxial Cable can cause slow share network cable?

I have a download speed of 81.00 Mbps and an Upload speed 11.34 using an HP laptop connected to Wi-Fi 5. I have a home modem Arris surfboard SB6121. I don't have AT&T fiber optic or faster technology types of internet. 47.234.198.142 (talk) 01:32, 24 February 2024 (UTC)

8K could use a lot of bandwidth, so yes, your streaming 8K could choke up the upload capacity! Graeme Bartlett (talk) 10:03, 24 February 2024 (UTC)

At the end of the day, a Coax cable is just a length of copper. A such, the whole cable industry is a series of scams, design to trick idiots into buying pricy cable. In actual fact, copper is copper, and regardless of the cost, it's the same darn metal! It doesn't matter what fancy baloney claim the cable manufactures claim, all cables are just the same copper strands inside. I hope this helps. Pablothepenguin (talk) 12:29, 27 February 2024 (UTC)

The "8K" thing is probably nonsense. Copper wire does not have any effect on download speeds, electrons always travel down these things at near relativistic speeds anyway. Pablothepenguin (talk) 12:30, 27 February 2024 (UTC)

Sure it matters. The speed of the electrons is actually pretty low, it's the speed of the electromagnetic wave which is relativistic. But that is only related to the latency of the cable; what OP cares about is the bitrate, which is related to the frequency of the EM signal you can send through the wire without excessive attenuation, which in turn depends on the resistance, inductance and capacitance. See telegrapher's equations. The thickness and electromagnetic properties of the insulator between the copper core and the copper sheat of the coax cable matter. PiusImpavidus (talk) 13:18, 27 February 2024 (UTC)

And the end connectors. Cheap ones make a bad connection, decreasing contact, increasing resistance, and reducing the signal. 12.116.29.106 (talk) 17:19, 27 February 2024 (UTC)

To address the OP's actual problem, although it's a bit old now: you have a Motorola/Arris Surfboard SB6121 (manual), a standard cable modem. 81 Mb/s is a decent download speed (although I once had Gigabit fibre to my front door.) How long have you been aware of slower speeds? Have you (or someone else) changed anything? Is the problem with the wireless? Remaining suggestions are concerned with this possibility.
Where are you getting your wifi from? I imagine you have a Wifi-enabled router or other device plugged into the Ethernet socket at the rear of the Surfboard. What make and type is it? How many other people are simultaneously using your wifi/router? More users generally = less bandwidth. Is your wireless connection secure (ie not acting as a wireless access point)? Have you tried plugging your HP laptop directly into the Ethernet socket on the Surfboard via a network cable? You may need to enable Flight Mode on the HP with (Fn+)F8 to temporarily turn off your wireless. Alternatively, turn off wireless interface[s] on the router/wifi device. Does it seem faster? If so, any reduction in speed is down to the wireless signal, the router, and/or other users connected to it. Re-connect the router to the Surfboard. Plug the laptop, via network cable, into an ethernet port on the router. Any difference? Unplug network cable, re-enable wifi. Any difference? MinorProphet (talk) 18:26, 8 March 2024 (UTC)