Gigabyte GA-X79-UD3 Gb LAN maxxes out at 100mbps

[13vs7]

Hi everyone.

I've just recently come into need of high speed transfer since I work with files from my NAS so I haven't noticed this problem before.

I've searched everywhere for a solution but couldn't find one, so I'm turning to you here.
I have a Gigabyte ga-x79-ud3 rev 1.0 mobo with what seems to be Intel 82579LM NIC onboard.
My problem is that the max transfer speed I get is 100 Mbps even though it is a 1Gbps adapter.
The cable isn't the problem, I tried sticking it into another PC and it ran 1Gbps no questions asked. I have the latest drivers from Intel (the ones from GB didn't work either). I've tried all the settings in the adapter's properties, nothing works.
When I manually set the speed to 1Gbps I get the message that the cable is unplugged. It works fine on manually set 100Mbps full duplex.

I'm running Win 10 Pro x64.

The one thing I havent yet tried is updating BIOS, since I'm still on F9, but can't update to F16/20 since the qFlash is outdated and I'm not to keen on doing it with @Bios. I did read somewhere that that might do the trick.

Does anyone have an idea what else I can do? Has anyone with this mobo or adapter run into this problem?

Looking forward to your replies and hopefully a solution.
B

 

[n0ns3ns3]

there could be a lot of things including HW problem like corrosion with the onboard NIC, or the device on the other end of the cable or some strong EMI or whatever else in the software.
what the cable connected to on the other end ?
Have you tried to connect another device instead of the computer and check the link speed ?

 

[bill001g]

I would try a different cable. Cables that go bad can work in some machines and not others. Some machines are just more tolerant of a cable that is out of spec.

It is highly unlikely it is any driver, the vast majority of the speed negotiation is actual hardware. This has been standard for so many years it is highly unlikely there is a issue with software. You need to leave the setting on auto. You would have to manually set both ends you can not have one side on auto and the other manually set.

You need to hope it is a cable issue almost everything else can not be fixed. If it is not the cable that only leaves bad ports on one end or the other. Unless it is something simple like a bent wire in a port your only option for a bad port is to replace it which means replacing the motherboard. Although you could use a add in nic card.

 

[Phillip Corcoran]

Don't want to risk a BIOS update? - - - then disable that NIC in Device Manager & install a new gigabit one.

 

[13vs7]

Don't want to risk a BIOS update? - - - then disable that NIC in Device Manager & install a new gigabit one.

Well I would normally have no problem flashing BIOS, but it's a PC I use for work so I cannot risk having it inoperable even for a day. I guess that buying a new adapter really is the best and the fastest option. Probably even the cheapest one, since I've been spending so much time working on a fix...
I've been so worked up by trying to find a solution for this, that I haven't even considered the option of buying a new adapter... :/
You might just have given me the solution to my problem without actually finding a solution to my problem.. :lol:

Thanks!

 

[13vs7]

there could be a lot of things including HW problem like corrosion with the onboard NIC, or the device on the other end of the cable or some strong EMI or whatever else in the software.
what the cable connected to on the other end ?
Have you tried to connect another device instead of the computer and check the link speed ?

If I had noticed sooner that the adapter wasn't working at full speed, I could at least narrow down my search for changes that were made, but for all I know it didn't work properly even when it was new. I don't think it's corrosion and there is no device that could cause such strong EMI, besides, like I said everything works fine on the other PC.
The cable is connected to a Gbit switch but so is the other PC.

I would try a different cable. Cables that go bad can work in some machines and not others. Some machines are just more tolerant of a cable that is out of spec.

It is highly unlikely it is any driver, the vast majority of the speed negotiation is actual hardware. This has been standard for so many years it is highly unlikely there is a issue with software. You need to leave the setting on auto. You would have to manually set both ends you can not have one side on auto and the other manually set.

You need to hope it is a cable issue almost everything else can not be fixed. If it is not the cable that only leaves bad ports on one end or the other. Unless it is something simple like a bent wire in a port your only option for a bad port is to replace it which means replacing the motherboard. Although you could use a add in nic card.

Well there is a Gbit switch both PCs are connected to, but the other PC works just fine connected by the same cable with same settings. Even on manual on this end. I think I'm just gonna buy a new adapter and call it a day. I just really wanted to find a fix for this. ..to get some satisfaction out of fixing this it.

Thanks.