zippytek
had this discussion with a friend regarding this NIC, diff board but apparently this nic is a nightmare across the board(s)...try updating the nvm and see how that fares. if it still poses problems, folks are switching to standalone nics...not that best solution i know but if it's a critical machine...
 
https://www.intel.com/content/www/us/en/download/18190/non-volatile-memory-nvm-update-utility-for-intel-ethernet-network-adapter-700-series.html
 

mmomega
Fingers crossed but for me, after reading probably 2 dozen "fixes" was to turn off the allow computer to power off this device for power savings"
and manually setting duplex and speed.
I have 5 computers in the house with i225v...sadly... and none have dropped, well, 3 now, 2 of them I put in SFP+ 10Gb NIC's. But the i225 is a backup to those and hasn't caused issues .... Yet. 

Bee_Dee_3_Dee

uplink_svk
Hey there mates!

Any idea or a fix for forcing the NiC on Z690 Dark Kingpin [any of them] to stop switching down to 100 mbps?

Thank You!

With kind regards

uplink

P.S.: Tried multiple drivers, old ones, newest one [2.0.1.13 or 12 or something], nothing helped :(

 
have u "Enable NetBIOS over TCP/IP"?
 
Control Panel>>All Control Panel Items>>Network and Sharing Center>>Select "Change adapter settings">>Select NIC>>Right Click NIC and Select "Properties">>Highlight "Internet Protocol Version 4 (TCP/IPv4)">>Click on "Properties" button>>Click on "Advanced" button>>Select "Wins" Tab>>Select "Enable NetBIOS over TCP/IP" bullet>>Click on OK. You MUST restart PC for it to take effect.
 
GL
 
every time i build a PC, or add a NIC, i have to remember to do it in order to achieve more than 12.5 MB transfer speeds over LAN. Before doing so i'm like- u-know-wat.lol And ranting how USB v1.1 was faster blah blah...lol and fearing everything under the sun's wrong maybe. but after doing it wam! the transfer speeds even on my old Wolfdale E8400 Intel PC over LAN gets well over 40 MBps (320mbps).

Bee_Dee_3_Dee

uplink_svk

mmomega
Fingers crossed but for me, after reading probably 2 dozen "fixes" was to turn off the allow computer to power off this device for power savings"
and manually setting duplex and speed.
I have 5 computers in the house with i225v...sadly... and none have dropped, well, 3 now, 2 of them I put in SFP+ 10Gb NIC's. But the i225 is a backup to those and hasn't caused issues .... Yet. 

Same here, I tried to kill that "allow computer to power off this device", and also force 1 gbps full duplex, didn't help, but always helped for a while with older driver. Which driver version do You use? The newest one? The 2.0.1.13 something?

Bee_Dee_3_Dee

uplink_svk
Hey there mates!

Any idea or a fix for forcing the NiC on Z690 Dark Kingpin [any of them] to stop switching down to 100 mbps?

Thank You!

With kind regards

uplink

P.S.: Tried multiple drivers, old ones, newest one [2.0.1.13 or 12 or something], nothing helped :(

 
 
have u "Enable NetBIOS over TCP/IP"?
 
Control Panel>>All Control Panel Items>>Network and Sharing Center>>Select "Change adapter settings">>Select NIC>>Right Click NIC and Select "Properties">>Highlight "Internet Protocol Version 4 (TCP/IPv4)">>Click on "Properties" button>>Click on "Advanced" button>>Select "Wins" Tab>>Select "Enable NetBIOS over TCP/IP" bullet>>Click on OK. You MUST restart PC for it to take effect.
 
GL
 
every time i build a PC, or add a NIC, i have to remember to do it in order to achieve more than 12.5 MB transfer speeds over LAN. Before doing so i'm like- u-know-wat.lol And ranting how USB v1.1 was faster blah blah...lol and fearing everything under the sun's wrong maybe. but after doing it wam! the transfer speeds even on my old Wolfdale E8400 Intel PC over LAN gets well over 40 MBps (320mbps).

Hey there mate! Thank You kindly for Your reply!

This looks interesting! :) I'm trying it at the moment. I also reverted to "default" Windows driver, since those original ones were totally wrecking my network connection. Now after restart I'm on NiC #1 and I'm running 1gbps. I'll report back whether it deteriorates down to 100 mbps, or whether it'll stay. Thank You!
 
//update #1: So I already lost a connection a few times [driver version 1.0.2.14], degraded down to 100 mbps, now I'm tryin' to run it with forced speed & duplex @ 1gbps full duplex. So far it holds, I'll see after a restart or so and will report back guys. Thank You!

cool. np. hope it stays 1Gbps.
 
i guess we have same two NICs.
Specs Page for Classified and Dark say,
"Ethernet – 2x Intel® 2.5 Gigabit NIC".
 
My Device manager says: 
"Intel(R) Ethernet Controller (3) I225-V"
and
"Intel(R) Ethernet Controller (3) I225-V #2"

i'm using driver from USB thumb drive that came with MOBO.
Driver Provider: Intel
Driver Date: 6/15/2021
Driver Version: 1.0.2.14
 
Edit: and no probs since building in late February.

Bee_Dee_3_Dee
@uplink_svk,
 
np.
 
So the problem is both 2.5 Gigabit NICs on the Dark act as if they are only 100 Mbps NICs. suks
 
And searching, "2.5 Gigabit NIC showing up as 100 Mbps"... 1st result confirms everything already covered: Ethernet Link Speed Capped at 100 Mbps
 
Even though ^^ covers almost exactly everything already covered on this thread maybe u can get something from it.
 
GL

Bee_Dee_3_Deenp 
 
and good, better, and great!!!
 
i thought it was all insane. u had properly checked ur topology stem to stern and left no rocks upturned. that link and ur previous post proved u had all in order problem-solving-wise.
 
 
as far as that link goes, i 1st documented the problem, and doing so, reminded me: if u have a problem on a Windows PC, thousands have and thousands are, having that same prob too. so i searched for the description.
 
 
Reminds me of how making a Full Backup Image on the 1st day of the month, followed by Incremental Backups just after starting my PC everyday, always leaves me the opportunity to go back before solving a problem (of course i make a new Incremental Backup immediately after solving a problem with my PC) back before a solution was found and actually implementing it i refer to as: Restoring a Backup Image Made Before A Problem Was Solved For The Sake Of Proving a Second Time That A Fix Was The Fix That Fixed It. 
 
^^ results in a sort of Time-Machine.
 
But in ur scenario, uplink_svk, it would be referred to as: Restoring a Backup Image Made Before A Problem Was Solved And The Solution Wasn't Known.
 
^^ wat a challenge it would be, aye?!
 
my guess is, it probably had something to do with restarting, in order for something u did, to be implemented change-wise. just another unwritten step.
 
GL

Bee_Dee_3_Dee

tresnugget
Any idea what fix got it going for you? After reading this I just noticed I've got the same issue. My router is 2500/2500 and just realized it drops to 100/100 after a while. Not a big deal if it was just 1000/1000 but 100/100 doesn't cut it.

 
i believe uplink_svk in post #17, was referring to how a week has gone by and it seemed fixed by trying the following:
 
A. Using the latest driver.
B. "Enable NetBIOS over TCP/IP"
C. Plus he made reference to how a power setting may have helped too.
 
Start by sticking with ur current driver and trying the following (from post #7):
 
"Enable NetBIOS over TCP/IP"
How To...
Control Panel>>
All Control Panel Items>>
Network and Sharing Center>>
Select "Change adapter settings">>
Select NIC>>
Right Click NIC and Select "Properties">>
Highlight "Internet Protocol Version 4 (TCP/IPv4)">>
Click on "Properties" button>>
Click on "Advanced" button>>
Select "Wins" Tab>>
Select "Enable NetBIOS over TCP/IP" bullet>>
Click on OK.
You MUST restart PC for it to take effect.
 
The other things uplink_svk checked was his Topology. Because if a single cable is bad, a port on a switch or modem, etc. then that could explain the problem. On Post #14 there's a link that has a plethora of info to help with Topology  Ethernet Link Speed Capped at 100 Mbps. But start by ignoring all the driver settings mentioned; and just try running with "all default driver settings" + "Enable NetBIOS over TCP/IP".
 
GL

tresnugget
Any idea what fix got it going for you? After reading this I just noticed I've got the same issue. My router is 2500/2500 and just realized it drops to 100/100 after a while. Not a big deal if it was just 1000/1000 but 100/100 doesn't cut it.