Question Why am I getting bandwidth/speed variations between LAN, 2.4 GHz WiFi & 5 GHz WiFi ?

[subhasispramanik]

Dear All,

Due to my limited knowledge, I am puzzled why my network bandwidth/speed varies with the different types of connection ie LAN, 2.4GHz WiFi and 5GHz WiFi ?

I have 125 Mbps broadband line which is connected with D-Link (DIR-841) wifi router.

While my Aspire E 14/E5-475G laptop connected to the router via LAN, it is getting 85-95 Mbps. Getting speed 85-98 Mbps while connecting to 2.5 GHz band and 124-130 Mbps while connecting to 5 GHz band.

Now, how to get around 120-125 Mbps speed while connecting to 2.5 GHz as can’t use 5 GHz band in distance due to its limitation.

I talked to ISP service personnel but instead of solving the issue he talking so many things and saying the like is working well. I am attaching few screenshots related to above statement. Hope they will be helpful.

Thanks.

 

[bill001g]

The ISP is mostly correct things are working pretty well.

I am somewhat surprised that you get so fast a speed on the 2.4g espeically since the basic connection "speed?" is only 150. You are getting much more than most people, I suspect you are sitting right on top of the router. Most times to get close to 100mbps on 2.4g you need to have a the encoding speed be 300 or maybe even 450.

The 5g radio band is getting a bit more than you are paying your ISP for so that is good your limit is the ISP. You would have to buy a higher plan to get more.

The only issue you have is the ethernet. It is only connecting at 100mbps and with the overhead in the transmission 94mbps is all you are going to see. This is almost always a bad cable. You can check the setting in your pc to be sure it is set to auto but it is rare for someone to change this and not remember doing it. Could be that there is dirt on one of the connectors or maybe a wire has a internal crack. It can also be that you have a fake cable, massive amounts of cables you see being sold are fakes. You need a cable that is pure copper wire (no CCA) and it must have wire size 22-24(no flat or thing cables). When you go shopping for cables be sure to look for this information if you can't find it then buy from someplace else. Almost all vendors know about the fake cables being sold and vendors of quality cable want you to know their cable is legit and why it costs a bit more.

 

[subhasispramanik]

If I understand correctly, you are saying 85-98 Mbps is a fast speed at 2.4 GHz while my Broadband plan is 125 Mbps. Is it not possible to get nearest speed as plan?

 

[bill001g]

Like I said I am surprised you get that fast on the 2.4g most people do not get that fast even with top end equipment. The reason 5g and now 6g even exist is there is not enough radio bandwidth on the 2.4g radio band to run faster speeds. The radio channels are limited to 40mhz bands where you can get 80 or even 160 on 5g. The trade off as you seem to know is the 5g radio band is blocked by walls more.

Although I doubt you see a difference you could try to replace the nic card in your pc. Your router supports 2x2 mimo but from the connection rate you get it appears as your nic is only 1x1.

I would not be spending money on a new nic card to get maybe 25mbps more bandwidth and that is not even guaranteed when you are talking 2.4g.