Question Weird Throttle Behavior Over WiFi

[Parc Fermé]

I have a very weird problem. My wifi connection is behaving like it's throttled by ISP.

Speedtests (near locations only), Netflix, Youtube, Steam etc, are fast (around 27Mbps) but most of the other things are around 15-20 Mbps.
I assumed my ISP throttling my connection which makes sense because when they claim they are better than other ISPs they talk about Netflix etc popular sites.

BUT the weird thing is when I tried to connect with ethernet cable, suddenly I have consistent 27Mbps everywhere. (Also the lag is gone while gaming) No throttle what so ever.

I get the same max download speeds with both but throttle only aplies on wifi. What? I don't understand.

Things I tried:
Tried different pc's and mobile phones even: Same behavior.
I disconnected every other device and put the connecting device dead near to router: Same behavior.
I glued a 12cm fan on router and now it's very cool: Same behavior.
I fiddled a bit with the settings on the router interface: Same behavior.

I downloaded a file that gets throttled while watching 4K Youtube video: Success! Combined speed is 27Mbps. QoS problem? Why affects wireless connection only?


ISP: TurkNet
DSL Modulation Type:VDSL2
Main Laptop: Asus X550JK
Router: TP-LINK TD-W9970 (Someother ISP's custom version. Can't update firmware to 2019 one and if I downgrade it to 2016, I can't even revert it back to 2017 one so I didn't tried to downgrade, last resort)


EDIT: I solved it! Two ways to solve this. First way is disabling 802.11n and using 802.11g. It worked but was slower than 802.11n so wasn't worth it.

Second way is disabling WMM. When using 802.11n, my router won't let me disable WMM so I disabled it through my wireless adapter's driver settings on Windows and it worked.

When using 802.11g, enabling or disabling WMM doesn't change anything that I can notice but 802.11n on my side is a nightmare with WMM enabled.

 

[mxnerd]

Because wifi is only half duplex. Your neighbor / other devices probably also uses the same frequency/channel as your router, whenever there is a transmission, there could be a conflict and data needs to be re-transmitted.

It's the nature of wireless networking.

 

[Parc Fermé]

Because wifi is only half duplex. Your neighbor / other devices probably also uses the same frequency/channel as your router, whenever there is a transmission, there could be a conflict and data needs to be re-transmitted.

It's the nature of wireless networking.

Thank for your really quick answer .
But my problem is very consistent and recreatable. On steam I can ALWAYS download at 27 Mbps but I can NEVER download that fast on many sites for like thinkbroadband.com's test files for download.(Except using cable) Wouldn't my Steam download speed contradict with interference issue? I also tried this at nights when the interference is lower and number just didn't change. Like I said it just very consistent and recreatable.

About half-dublex, this time I'm less sure but still, wouldn't my Steam download speed contradict with it's being the issue?

 

[mxnerd]

Large companies use CDN around the world and have servers closer to your location.

 

[Parc Fermé]

Large companies use CDN around the world and have servers closer to your location.

How does that explain difference between wifi and ethernet speed? The "many sites" I was talking about were slow with only wifi but always fast with ethernet cable. I'm of course aware that not every site can provides the speed I have, but the ones can, can only provide it over ethernet cable.

 

[mxnerd]

Maybe someone else can explain that for you.

Besides, if you are not happy with ISP provided router's wifi performance, you can always buy a new router and use it as an AP and disable your main router's wireless.

 

[Parc Fermé]

Maybe someone else can explain that for you.

Besides, if you are not happy with ISP provided router's wifi performance, you can always buy a new router and use it as an AP and disable your main router's wireless.

I was hoping for a free solution for a while but I don't think thats possible anymore Anyways thanks for your answers.

 

[VirtualLarry]

It could also be an issue between your wireless client NIC, and the router's wifi chipset / SoC. I've seen compatibility problems between certain pair-ups, that limit effective throughput. The solution, generally, is to replace one or both pieces of hardware.

 

[JackMDS]

I would try the following, buy/borrow/get a regular Access Point with dual band or a Real Wireless Router configure it as an Access Point.

Switch off the Wireless part of your VDSL Router Modem combo, connect its output via cable to the Access Point (just AP no additional Routing)

I.e., let a regular good Wireless device get the feed through cable and provide real Dual band Wireless .

 

[ch33zw1z]

Ugh, sounds like that router is garbage.