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Windows 7: NIC slows its speed down after short period of time.

25 Jul 2011   #1
YoMaMMa186

Windows 7 Ultimate x64
 
 
NIC slows its speed down after short period of time.

I have a home server running Windows 7 Ultimate x64 on a PC with an Asus P5N-D motherboard. (nVidia 750i SLI chipset, nForce 10/100/1000 NIC)
We have around 10TB of hard drives connected to it and all are in RAID 1. (two 2TB+2TB arrays with Seagate Green drives and one 1TB+1TB array with Seagate 7200.12 drives)
Randomly, it will decide to slow down from gigabit to 100mbps. (My router shows gigabit as orange and 100mbps as green)
That's very unfortunate for us seeing as we transfer hundreds of gigs of data through it regularly.
If I unplug the cable from my router (Netgear N600 DR3700, DD-WRT v24-sp2 (02/17/11) st) and immediately reconnect it, it goes back to gigabit. (The light also switches from green, 100mbps, to orange, gigabit)

Here is a screenshot of my advanced network settings box.

NIC slows its speed down after short period of time.-settings.png

And here are the settings I have selected:

Network Address: Not Present
Priority and VLAN: Priority Enabled
Speed/duplex settings: Auto Negotiation
VLAN ID: 1
EVERYTHING else is set to Disable

Under Power Management, "Allow .... turn off to save power" is unchecked.
Any help? I'd rather it stay in gigabit mode.
Thanks.




My System SpecsSystem Spec
.
26 Jul 2011   #2
wilywombat

win7
 
 

Hi YoMaMMa186, welcome to seven forums. Have you got the latest nvidia drivers for your board :- NVIDIA DRIVERS 15.57 WHQL If not try an update.
My System SpecsSystem Spec
26 Jul 2011   #3
zigzag3143

Win 8 Release candidate 8400
 
 

Quote   Quote: Originally Posted by YoMaMMa186 View Post
I have a home server running Windows 7 Ultimate x64 on a PC with an Asus P5N-D motherboard. (nVidia 750i SLI chipset, nForce 10/100/1000 NIC)
We have around 10TB of hard drives connected to it and all are in RAID 1. (two 2TB+2TB arrays with Seagate Green drives and one 1TB+1TB array with Seagate 7200.12 drives)
Randomly, it will decide to slow down from gigabit to 100mbps. (My router shows gigabit as orange and 100mbps as green)
That's very unfortunate for us seeing as we transfer hundreds of gigs of data through it regularly.
If I unplug the cable from my router (Netgear N600 DR3700, DD-WRT v24-sp2 (02/17/11) st) and immediately reconnect it, it goes back to gigabit. (The light also switches from green, 100mbps, to orange, gigabit)

Here is a screenshot of my advanced network settings box.

Attachment 167011

And here are the settings I have selected:

Network Address: Not Present
Priority and VLAN: Priority Enabled
Speed/duplex settings: Auto Negotiation
VLAN ID: 1
EVERYTHING else is set to Disable

Under Power Management, "Allow .... turn off to save power" is unchecked.
Any help? I'd rather it stay in gigabit mode.
Thanks.
Can we assume the usual? CAT6 enhanced cable, short runs (<10 meters)? How many devices are wired through the router? Are all devices terminated correctly (old school question)?

If push comes to shove you can throw a packet analyzer on it to see how many re-transmits there are.
My System SpecsSystem Spec
.

26 Jul 2011   #4
YoMaMMa186

Windows 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by zigzag3143 View Post

Can we assume the usual? CAT6 enhanced cable, short runs (<10 meters)? How many devices are wired through the router? Are all devices terminated correctly (old school question)?

If push comes to shove you can throw a packet analyzer on it to see how many re-transmits there are.
Category 5E cable. The cable from the server to the router is 3 meters. The router has one port for my room (which contains an 8 port gigabit switch), one for my brothers room (which contains an 8 port gigabit switch), one for the server, and one that goes out to a 10/100 24 port switch for the rest of the house. All devices should be terminated correctly, my dad was a journeyman electrician and spent 15 years of his life installing these cables for others.
My System SpecsSystem Spec
26 Jul 2011   #5
zigzag3143

Win 8 Release candidate 8400
 
 

Quote   Quote: Originally Posted by YoMaMMa186 View Post
Quote   Quote: Originally Posted by zigzag3143 View Post

Can we assume the usual? CAT6 enhanced cable, short runs (<10 meters)? How many devices are wired through the router? Are all devices terminated correctly (old school question)?

If push comes to shove you can throw a packet analyzer on it to see how many re-transmits there are.
Category 5E cable. The cable from the server to the router is 3 meters. The router has one port for my room (which contains an 8 port gigabit switch), one for my brothers room (which contains an 8 port gigabit switch), one for the server, and one that goes out to a 10/100 24 port switch for the rest of the house. All devices should be terminated correctly, my dad was a journeyman electrician and spent 15 years of his life installing these cables for others.
Had to ask

only thing I can guess is the cable run is short enough, perhaps cat 5E isnt quite up to gigabit. I might try a cat 6E run (cheap enough to test)
My System SpecsSystem Spec
27 Jul 2011   #6
wilywombat

win7
 
 

Should be Cat 6, 6E or 7 for gigabit.
My System SpecsSystem Spec
31 Jul 2011   #7
YoMaMMa186

Windows 7 Ultimate x64
 
 

I switched to the one Cat6 Cable I own to try and will be updating the drivers also as posted. Thanks.
We'll see in a few days if it works.
My System SpecsSystem Spec
05 Aug 2011   #8
YoMaMMa186

Windows 7 Ultimate x64
 
 

Alright thanks guys!
I changed both the cable and updated the drivers and it seems to be working.
My System SpecsSystem Spec
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 NIC slows its speed down after short period of time.




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