Crazy slow speed out of the motherboard ethernet

[mackle]

Hi, I have a strange problem where I cant upload at anything more than about 25Kb/sec out of my the Ethernet port on my motherboard.

So I changed a few things at once,  I updated my motherboard to the Z77M-D3H-MVP.
As well as the Intel Core I7 3770K.  I also reinstalled my O/S on a Sandisk extreme connected to the motherboard on Sata 3 and I updated my DDR3 memory from 6 to 16 Gb.

Everything works fine, except I upload at 25KB/sec (note my download is1.5MB/Sec).
Upload includes, to the internet and also to a NAS hard drive that is plugged in to my modem.

I plugged a TP-Link 300Mbps Wifi-dongle in to my PC and connected to the same modem via wireless and uploaded to my NAS hard drive at 1.2 MB/sec.
I also got a similar huge increase in speed on an online upload test.

Given the modem is the same as what I had before, something is strange about this new motherboard ethernet port.

I flashed the bios from F1 to F6 (no fix).
I downloaded  Atheros LAN driver from the Gigabyte website (no fix).

I am running windows 7 64 bit, my modem is a Billion BiPAC 7401VGPR3.

Please help!

[Dark Mantis]

Hi and welcome.

From your description of the problem I would say that the most likely culprit is a bad cable or connection. That would be why you could get a much better speed when using wireless which is usually slower than hardwired. Upload speed is usually slower than download speed(in the uk about 4:1 but it varies) so don't expect as fast a rate.

[mackle]

The cable is quite new and is the same one i used  before I upgraded my motherboard.
I think the problem has to be related to software or the hardware of the motherboard itself.

It is also a constant 25-28KB/sec, not 10 not 50, that is strange, it is as if there is some blocking program to prevent uploads faster than this speed.

As I said before, I can upload 60 times faster to the modem using wireless, something is very wrong