Question New PC build, ethernet and WIFI are slow after a few weeks

[majiinakuma]

Hi all,

Classic internet connection issue here with new Windows 11 PC build. All worked perfectly upon first building, then a couple weeks later, ethernet decided to go slow, especially for sites like YouTube and Facebook.

-The internet works good on every device in the home save my new PC. That includes phones, my wife's PC, my wife's Mac and PC laptops, the TV, PS5, Switch, etc. etc. you get the point.

-Make and model of router: Netgear Nighthawk AC1900, Model: R6900P

-Make and model of modem: Spectrum, Model: There are many numbers and I'm not sure which 'cause it doesn't say the words "model number"

-Internet Service Provider: Spectrum

-PC Specs: -Motherboard: X870E Aorus Elite Wifi 7
-CPU: AMD Ryzen 9 7900X 12-Core
-RAM: G.SKILL Flare X Series 64GB (2 x 32GB) 288-Pin PC RAM DDR5 6000
-Main SSD: SAMSUNG 990 PRO SSD NVMe M.2 PCIe Gen4, M.2 2280
-OS: Windows 11 Home, Driver Ver: 24H2
-Make and model of USB or PCI Wifi adapter: Unsure how to find this information, though I have added no peripheral wifi hardware nor antenna
-Power Supply: be quiet! Pure Power 12 M 850W ATX 3.1, 80 Plus® Gold Modular Power Supply for PCIe 5.0 GPUs and GPUs with 6+2 pin connectors
-Case: Antec Flux Pro

-Additional Info: Wired LAN Connection Only information
-At all times 2 brand new PCs are attached to the network. Mine with ethernet, my wife's with WIFI
-Make and model of switches and how many ports are on each switch: Do not know how to check this
-No NAS network attached
-I think a WIFI router is connected to the network due to my Netgear Nighthawk having WIFI (if I'm getting this info wrong, sorry, I'm bad at network stuff)
-I believe the ethernet/LAN connection is through the motherboard directly, definitely not attached via some external item

-PS: All drivers are updated and working and internet speed tests always show good connections

 

[Ralston18]

Most likely the new PC is not configured correctly.

To start the troubleshooting process run "ipconfig /all" (without quotes) on the new PC via the Command Prompt.

You should be able to copy and paste the full results without needing to retype everything.

Likewise do the same on your wife's PC but hold those results (just print them out) for comparison purposes later.

 

[majiinakuma]

Most likely the new PC is not configured correctly.

To start the troubleshooting process run "ipconfig /all" (without quotes) on the new PC via the Command Prompt.

You should be able to copy and paste the full results without needing to retype everything.

Likewise do the same on your wife's PC but hold those results (just print them out) for comparison purposes later.

Sorry for the ignorant question, but you want me to copy/paste the results directly here for you to examine, correct?

 

[Ralston18]

Not an ignorant question.

Yes: "ipconfig /all" does not reveal any personally identifying information excluding your name if that happens to be the name of your computer or network.

Here is my "ipconfig /all" where XXXX indicates what I redact.

= = = =

Windows PowerShell
Copyright (C) Microsoft Corporation. All rights reserved.

Install the latest PowerShell for new features and improvements! https://aka.ms/PSWindows

PS C:\Users\XXXX> ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : ChXXXX
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : hsd1.XXXX.comcast.net

Ethernet adapter MXXXXX:

Connection-specific DNS Suffix . : hsd1.XXXX.comcast.net
Description . . . . . . . . . . . : Realtek PCIe GbE Family Controller
Physical Address. . . . . . . . . : 8C-EC-4B-7E-7E-D4
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv4 Address. . . . . . . . . . . : 192.168.1.117(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Monday, January 20, 2025 5:31:47 AM
Lease Expires . . . . . . . . . . : Tuesday, January 28, 2025 5:31:46 AM
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DNS Servers . . . . . . . . . . . : 8.8.8.8
8.8.4.4
NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter Bluetooth Network Connection:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Bluetooth Device (Personal Area Network)
Physical Address. . . . . . . . . : 74-40-BB-D5-2D-BE
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

= = = =

Your results will, of course, be different.

I use a wired network connection - no wireless adapter installed. If so it will be listed.

First step is to look that the results from your PC.

Second step is to compare those results to your wife's results.

Differences, either way, may help identify the culprit.

 

[majiinakuma]

Not an ignorant question.

Yes: "ipconfig /all" does not reveal any personally identifying information excluding your name if that happens to be the name of your computer or network.

Here is my "ipconfig /all" where XXXX indicates what I redact.

= = = =

Windows PowerShell
Copyright (C) Microsoft Corporation. All rights reserved.

Install the latest PowerShell for new features and improvements! https://aka.ms/PSWindows

PS C:\Users\XXXX> ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : ChXXXX
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : hsd1.XXXX.comcast.net

Ethernet adapter MXXXXX:

Connection-specific DNS Suffix . : hsd1.XXXX.comcast.net
Description . . . . . . . . . . . : Realtek PCIe GbE Family Controller
Physical Address. . . . . . . . . : 8C-EC-4B-7E-7E-D4
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IPv4 Address. . . . . . . . . . . : 192.168.1.117(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Monday, January 20, 2025 5:31:47 AM
Lease Expires . . . . . . . . . . : Tuesday, January 28, 2025 5:31:46 AM
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DNS Servers . . . . . . . . . . . : 8.8.8.8
8.8.4.4
NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter Bluetooth Network Connection:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Bluetooth Device (Personal Area Network)
Physical Address. . . . . . . . . : 74-40-BB-D5-2D-BE
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

= = = =

Your results will, of course, be different.

I use a wired network connection - no wireless adapter installed. If so it will be listed.

First step is to look that the results from your PC.

Second step is to compare those results to your wife's results.

Differences, either way, may help identify the culprit.

OK. Here is mine. Because my PC's name has sensitive info, I've removed it.

Microsoft Windows [Version 10.0.26100.2894]
(c) Microsoft Corporation. All rights reserved.

C:\Users\n/a>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : n/a
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Unknown adapter NordLynx:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : NordLynx Tunnel
Physical Address. . . . . . . . . :
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::cd1b:1929:7636:d067%24(Preferred)
IPv4 Address. . . . . . . . . . . : 10.5.0.2(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . :
DNS Servers . . . . . . . . . . . : 103.86.96.100
103.86.99.100
NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter Ethernet:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek PCIe 2.5GbE Family Controller
Physical Address. . . . . . . . . : 10-FF-E0-8C-0B-C8
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::11aa:319f:6bb9:eba2%9(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.3(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Monday, January 20, 2025 10:02:58 AM
Lease Expires . . . . . . . . . . : Tuesday, January 21, 2025 10:02:58 AM
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DHCPv6 IAID . . . . . . . . . . . : 168886240
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-2E-FA-10-09-10-FF-E0-8C-0B-C8
DNS Servers . . . . . . . . . . . : 192.168.1.1
NetBIOS over Tcpip. . . . . . . . : Enabled

Unknown adapter Local Area Connection:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : TAP-NordVPN Windows Adapter V9
Physical Address. . . . . . . . . : 00-FF-EC-B5-32-7C
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Unknown adapter OpenVPN Data Channel Offload for NordVPN:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : OpenVPN Data Channel Offload
Physical Address. . . . . . . . . :
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Wireless LAN adapter Wi-Fi 2:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek 8922AE WiFi 7 PCI-E NIC #2
Physical Address. . . . . . . . . : EA-47-3A-FD-3F-26
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

Wireless LAN adapter Wi-Fi 4:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek 8922AE WiFi 7 PCI-E NIC #4
Physical Address. . . . . . . . . : EE-47-3A-FD-3F-26
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Wireless LAN adapter Wi-Fi:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek 8922AE WiFi 7 PCI-E NIC
Physical Address. . . . . . . . . : E8-47-3A-FD-3F-26
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

 

[Ralston18]

Thank you - no problem with removing the host name.

Are you knowingly using some VPN?

Have you tried swapping in another Ethernet cable from another known working (no problems) wired computer or device? From your wife's system for example.

= = = =

Here is what I am seeing.

[Note: Others may post as well if I have missed something or made some error of omission or commission. ]

Your computer is using an Ethernet (wired) connection and currently being provided a DHCP IP address of 192.168.1.3 via a Default gateway at 192.168.1.1. (Commonly used Gateway IP address and one that used by your NetGear router/gateway).

Note: try to find the make and model information for that Spectrum modem(?). The modem might also be a router and, if so, its' router functions should be disabled and left to the NetGear router. Two routers likely would be causing more and greater problems. Still, modem info just for the record and a matter of elimination.

The 192.168.1.3 (Preferred) IP address is a DHCP IP address which can and does change. Provided to your computer when your computer is turned on and automatically requests a network IP address from the network router/gateway.

The subnet mask 255.255.255.0 is as expected for small home and business networks.

Lease time is only 24 hours. Technically not an issue but short lease times can be problematic. I use 8 days.

IPv6 is enabled. Often problematic and disabling IPv6 may solve problems.

No wireless adapters enabled. That is good because only one network adapter (either wired or wireless) should be enabled on the computer. (Barring specific requirements for doing so. Unlikely in your environment as I currently understand the posts thus far.)

So nothing immediate or some "Eureka"discovery via ipconfig.

Print out the ipconfig from your wife's computer - is it getting an IP address from 192.168.1.1?

Are you able to access your router's admin screens? Are any of your network devices (printer, NAS, IoT, TV, etc.) using a static IP address that you assigned? Or possibly a default IP address that is the same as another network device.

Check all devices and make a list, for your own use, that lists each device, make, model, device name, IP address, and MAC. Looking for duplicates of any sort.

Hopefully, the router will provide some listing of all connected network devices and their IP addresses. Some routers also keep a record of past connections. There may be logs as well - if present and enabled.

Routers can be configured to limit the number of connected devices. There could also be some IP address conflict. No duplicate IP addresses are permitted.

I also noted that you mentioned a switch - make, model, how connected? That is important because there may be a network loop of some sort.

Device A connected to Device B connected to Device C connected to Device D connected to Device A again.

Network loops can slow things down....

Not always apparent and sketching out the network may reveal some such loop. Especially with a switch connected in somewhere.

Quite a bit overall but keep looking .

If there are other computers (including the Macs) check their respective IP configs as well. For a Mac: Open Terminal and use "ipconfig -a".

 

[majiinakuma]

UPDATE: Thank you for your help, but the problem has been solved. Apparently, Gigabyte just *loooves* to install something called Gigabyte Speed which is notorious for slowing down PCs so much so it's in the Wiki page. I love Windows and PCs, but sometimes I hate them for stupid things like this I didn't even ask for to be installed. Rumor abounds it can even reinstall it automatically.