Slow wifi speeds only on desktop pc, under 1mbps.

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theseacucumber

Commendable
Nov 30, 2016
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Getting extremely slow internet speed (wireless)to my pc even after buying a new network card and reinstalling windows.

I've updated my NIC card (Asus PCE-AC51) with their official drivers. Other devices on the network don't have these issues, my phone is getting 20-40mbps whereas my PC is getting under 1 mbps.

I should also mention that my router/modem are in the same room as the PC and are less than 5 metres away from each other. I get full bars on the wifi icon in windows.

I can't figure out what's going on, any help would be greatly appreciated!

Other things I've tried...
Reset tcp/ip via cmd.
Looking for programs that restrict network use.
Running an AVG antivirus scan (nothing came up).

Build
OS: Windows 10
Mother Board: Gigabyte GA-Z97X-UD5H-BK
NIC: Asus PCE-AC51 Wireless-AC750
CPU: Intel i7-4770k 3.5 ghz
GPU: Nvidia GeForce gtx 980

Edit* Ok so suddenly out of nowhere my speed jumped up to 15mbps, it feels as though something on my machine (or maybe network) is restricting the amount of network traffic goes through my PC.

Edit* Not sure what to think from speed tests as speedtest.net gave me around 5mbps down whereas www.broadband.co.uk gave me 24mbps down.

FIX*

Ok, so I ran a windows troubleshooter that told me that "The connection between your access point, router or cable modem and the Internet is Broken." and advised me to reset my modem.

So I reset (unplugged for 30 seconds then plugged back in) both my modem and my router and tried a speed test again.

I got around a 40 mbps download speed which is what I'm after. This may have fixed my issue, if the issue comes back I will make an edit to this post.

Thanks for the help!
 
Solution
T
Ok, so I ran a troubleshooter that told me that "The connection between your access point, router or cable modem and the Internet is Broken." and advised me to reset my modem.

So I reset (unplugged for 30 seconds then plugged back in) both my modem and my router and tried a speed test again.

I got around a 40 mbps download speed which is what I'm after. This may have fixed my issue, if the issue comes back I will make an edit to this post.

Thanks for the help!

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androbourne

androbourne

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Jul 18, 2017
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It sounds like interference with the wifi. You could also try another PCI port on the mobo to see if that changes anything.

My main question to you is why do you use wifi if the PC and router are in the same room and that close together? You will always get better performance via ethernet connection over wifi.
 
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T

theseacucumber

Commendable
Nov 30, 2016
7
0
1,520


I move from home to university for holidays etc and the router is across the house when I'm at student accommodation so it's a lot easier for me to use wireless at the moment. I'm sure that using wired would be a lot better but I can't in the situation I'm in.

There are no other pcie slots for network cards on my mobo. Is there any way I can test for interference?
 
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theseacucumber

Commendable
Nov 30, 2016
7
0
1,520


Ok so I just used a wifi analyser on my phone and positioned my phone behind my PC where the antennas for the NIC are and got ok readings. The measurement was in the green and near the top of the scale (at around -40 dBm if that helps). It doesn't seem like there is any wifi interference.
 
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theseacucumber

Commendable
Nov 30, 2016
7
0
1,520


It's a BT Home Hub 3.0. My ISP is also BT.
None of my other devices are getting this problem, just did a speed test on my phone and got 25 ms ping, 42.63 mbps download and 12.31 upload.

I'm also going through all devices on my machine and ensuring their drivers are up to date through device manager.
 
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theseacucumber

Commendable
Nov 30, 2016
7
0
1,520


On the package my NIC came in it says "For 802.11 a/b/g/n/ac Wireless Networks"
My routers Wireless Interface Type is "802.11 b/g/n (Recommended)"
 
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T

theseacucumber

Commendable
Nov 30, 2016
7
0
1,520
Ok, so I ran a troubleshooter that told me that "The connection between your access point, router or cable modem and the Internet is Broken." and advised me to reset my modem.

So I reset (unplugged for 30 seconds then plugged back in) both my modem and my router and tried a speed test again.

I got around a 40 mbps download speed which is what I'm after. This may have fixed my issue, if the issue comes back I will make an edit to this post.

Thanks for the help!

 
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Solution
androbourne

androbourne

Honorable
Jul 18, 2017
2,369
6
13,615
Well be careful though.

If it happens more often then a few times a year. Issue could be a dying modem or router.

Best way to test this is next time the speed drops. Try only rebooting the router first and see if wifi speeds are restored. If they are then you know issue is with the wireless on the router and you may want to look into replacing it.

Whats weird is that you said it only effected your PC and not others on the network. So I'm not sure how it is a router or modem issue if other PCs are working fine on the wireless?... just a thought.
 
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