Only 40mbps on 200mbps connection?

TDave7 · Apr 21, 2017

Hey guys. So I just bought a laptop, and I checked the speed of my internet on it. It said 40 mbps on speedtest.net. I have a 200mbps internet in my home, and on LAN its fine. My laptop supports 802.11ac, thats why I dont understand why it's so slow. My laptop is the new Y520 Legion, my router is TL-WR1043ND which support 300mbps according to the bottom of it. Is there a setting on my laptop to make it faster?
Thank you in advance

Solandri · Apr 21, 2017

That router is a 2.4 GHz-only 300 Mbps 802.11n router, not ac. 300 Mbps is the optimal bandwidth using two channels. If only one channel is used, you get 150 Mbps.

Roughly half of that is used for error correction data, so ideal real-world transfer speed is about 75 Mbps.

If you're more than about 5 meters from the router or if there's RF noise, speed will drop. So I'm not surprised you're only getting 40 Mbps.

The obvious fix is to replace your router with a new one that supports 802.11ac. The slowest speed of 802.11ac is 433 Mbps (about 216 Mbps ideal, 100-150 Mbps at distance). Most routers will do 866 Mbps, which will get you about 200-400 Mbps in real-world use. 802.11ac is 5 GHz-only as well, so suffers less interference.

If you want to try improving the situation with your current router, go into its settings and make sure channel bonding / wideband is enabled (300 Mbps instead of 150 Mbps). And do a site survey to see what 2.4 GHz channels are being used. Try to set the router to a channel which is relatively clear. (Only channels 1, 6, and 11 are independent on 2.4 GHz, since each "channel" actually covers 5 channels. So 1 is 1-5,, 6 is 6-10, etc.)

TDave7 · Apr 21, 2017

Solandri :

That router is a 2.4 GHz-only 300 Mbps 802.11n router, not ac. 300 Mbps is the optimal bandwidth using two channels. If only one channel is used, you get 150 Mbps.

Roughly half of that is used for error correction data, so ideal real-world transfer speed is about 75 Mbps.

If you're more than about 5 meters from the router or if there's RF noise, speed will drop. So I'm not surprised you're only getting 40 Mbps.

The obvious fix is to replace your router with a new one that supports 802.11ac. The slowest speed of 802.11ac is 433 Mbps (about 216 Mbps ideal, 100-150 Mbps at distance). Most routers will do 866 Mbps, which will get you about 200-400 Mbps in real-world use. 802.11ac is 5 GHz-only as well, so suffers less interference.

If you want to try improving the situation with your current router, go into its settings and make sure channel bonding / wideband is enabled (300 Mbps instead of 150 Mbps). And do a site survey to see what 2.4 GHz channels are being used. Try to set the router to a channel which is relatively clear. (Only channels 1, 6, and 11 are independent on 2.4 GHz, since each "channel" actually covers 5 channels. So 1 is 1-5,, 6 is 6-10, etc.)

Wow, well, that makes lots of sense. I was just surprised that it like 3 meters away from the router i get only 1/5 of it. Thank you very much!

Phillip Corcoran · Apr 21, 2017

Well if you're only 3 metres away you can use ethernet with a 3m CAT cable instead of using WiFi - - problem solved.

TDave7 · Apr 21, 2017

Phillip Corcoran :

I dont want a random cable in the middle of my room hahaha

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