LAN limited to 10 Mbps (even when switching auto-negotiation off)

dutchstriker

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Feb 15, 2012
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This is my first time posting for help, which shows how desperate I am. It also means I may be breaking protocol, but I did try to read all the forum posts that sounded like they could help me, and otherwise did a lot of google searches before coming here.

The problem: my Windows 10 desktop's internet speed is limited to 10 Mbps. It's connected to my router via a Cat6 ethernet cable. When I check the Ethernet Status screen, it shows my speed as 10.0 Mbps.

It's not the cable: I've used the cable on my laptop to test, and I get 178 Mbps on the laptop using the same cable and router.

My motherboard is capable of 1000 Mbps LAN. It's a GIGABYTE GA-Z68XP-UD3 (http://www.newegg.com/Product/Product.aspx?Item=N82E16813128512).

My router is also capable of 1000 Mbps LAN. It's an Apple Airport Extreme. (The modem is a Motorola Surfboard SB 6141.)

I have the latest drivers from the Realtek website.

I've gone into the advanced settings of the Reltek PCIe GBE Family Controller to manually override the auto negotiation under Speed & Duplex, as I've seen recommended in this forum and elsewhere. Even after doing so, the Ethernet Status screen shows the speed as 10.0 Mbps. Performing an online speed test confirms the speed is under 10 Mbps.

Using a cheap USB wireless dongle that came in the kit with my RaspberryPi, I was able to get around 16 Mbps download speeds.

I recently did a clean reinstall of Windows 10. I had this problem before and after.



I would greatly appreciate any help anyone can offer. I've tried everything I can think of and spent a lot of time searching for the answer. Is there a setting in my BIOS I need to change or something? Thank you in advance. I'll be monitoring this thread and responding to any questions you all might have for me.
 


Thank you. I just went to Gigabyte's website and downloaded their latest driver for my motherboard but the problem persists.
 
Anyone else with a suggestion? I might concede defeat and get a good wireless USB adapter. If my laptop can get 178 Mbps wireless, hopefully one of those suckers can get me over the 9 Mbps I'm getting wired now.
 
I know no one is following this, but an update anyway: I tested the connection directly from the modem (bypassing the router) and the speed was automatically listed at 1.0 Gbps and I got 180 Mbps on an internet speed test. So I guess the problem is with the connection between the router and the computer. I don't know how to fix that, so I'll just pick up an ethernet splitter (assuming such things exist and work).