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25 Jul 2011  
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.


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