Question NIC gradually slows after boot.

[dbrown1986]

Upon initial boot of Windows 10, this is my network speed:
https://www.speedtest.net/my-result/d/9c5b4232-6259-46b7-88d0-1a392d4686ba

Within 20 minutes, it has slowed to about 1-3mbps.

Thought it might have been my NIC, so I dropped a dedicated PCIe NIC in the PC; and it to is prone to the same slowdown. So it may be software hogging all the bandwidth. My first thought was Google Drive File Stream, but the slowdown is effecting that as well, and it's even slow when GDFS is not syncing anything to my GSuite.

--System Specs--
MSI X470 Gaming Plus
AMD RYZEN 1700
G.Skill AEGIS 32GB DDR4-2400
nVidia GeForce 1660 Ti 6GB
Silicon Power (SPCC) 2TB NVMe
Seagate 4TB Magnetic (ST4000DM000-1F2168)
HL-DT-ST DVDRAM (GSA-H60N)
HL-DT-ST BD-RE (WH14NS40)
CoolerMaster 850W Gold, Modular.
Windows 10 Build 2004, up-to-date.

If I disable and re-enable my NIC's in Windows Network Connections, it will return to the initial 400+ mbps, but within a few minutes has regressed back to 1-3mpbs (https://www.speedtest.net/my-result/d/c2467f3f-1309-4712-a211-bfce00d237a4)

I've looked at Resource Monitor and have been relatively unable to pinpoint anything in particular. Are there any software tools that I might be able to use to see what's sapping my NIC's so hard?

Let me know if there are logs or diags I should share.

 

[Ralston18]

Take a look in Task Manager.

First check what all is being launched at startup. Then observe system performance before, up to, and after the speed drop.

Objective being to identify some background app or utility that may be sitting idle but becomes active after 20 minutes. Maybe to back up, update, or simply phone home.

Another place to look is Task Scheduler - not overly user friendly but likewise look for something being started at about 20 minutes.

Process Explorer may prove helpful. You may need to download via Microsoft's website. Free.

https://docs.microsoft.com/en-us/sysinternals/downloads/process-explorer

Noted that you did look in Resource Manager. Take another look and remember that you can sort the data columns by right-clicking the column headers with the small upward or downward pointing arrow.

Temporarily turn off all power savers. If the problem ends then restore the power savers one by one over time - determine if one particular power saver causes the speeds to again drop.

Lastly, run "ipconfig /all" via the Command Prompt and post the results.

 

[dbrown1986]

• Disabled startup apps
• Schedular had timed, weekly, monthly and @logon items, but nothing that was around 20 minutes, so I disabled anything that didn't say Microsoft on it.
• All power options have been set to High Performance / Gaming since install (everything power save related has been disabled, in favor of shutting down when the computer is not in use).

ipconfig as requested:

Windows IP Configuration

   Host Name . . . . . . . . . . . . : AQUINAS-PC
   Primary Dns Suffix  . . . . . . . :
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Ethernet 3:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Realtek PCIe GbE Family Controller
   Physical Address. . . . . . . . . : 00-D8-61-2C-0D-7C
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::c89f:4420:aba6:570%15(Preferred)
   IPv4 Address. . . . . . . . . . . : 192.168.1.5(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Lease Obtained. . . . . . . . . . : Thursday, September 24, 2020 9:36:59 AM
   Lease Expires . . . . . . . . . . : Sunday, October 31, 2156 4:05:50 PM
   Default Gateway . . . . . . . . . : fe80::9e3d:cfff:fe83:6e2%15
                                       192.168.1.1
   DHCP Server . . . . . . . . . . . : 192.168.1.1
   DHCPv6 IAID . . . . . . . . . . . : 536926305
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-26-E6-DA-5D-E8-4E-06-67-14-DF
   DNS Servers . . . . . . . . . . . : 192.168.1.1
                                       fe80::9e3d:cfff:fe83:6e2%15
   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. . . . . . . . . : 00-19-86-00-28-97
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes

Ethernet adapter vEthernet (Ethernet 3):

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Hyper-V Virtual Ethernet Adapter
   Physical Address. . . . . . . . . : 00-15-5D-93-BF-DE
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::9944:59ef:1186:3722%31(Preferred)
   IPv4 Address. . . . . . . . . . . : 172.19.16.1(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.240.0
   Default Gateway . . . . . . . . . :
   DHCPv6 IAID . . . . . . . . . . . : 520099165
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-26-E6-DA-5D-E8-4E-06-67-14-DF
   DNS Servers . . . . . . . . . . . : fec0:0:0:ffff::1%1
                                       fec0:0:0:ffff::2%1
                                       fec0:0:0:ffff::3%1
   NetBIOS over Tcpip. . . . . . . . : Enabled