Ethernet Slow on Yosemite

[Waleed]

Hello, I have recently did a clean install of Yosemite on my Mackintosh that was previously running OS X Mavericks. Everything seems to be working correctly including the Ethernet but I am getting very slow speed. Before on Mavericks I would get 20-25 Mbps according to SpeedTest and now I'm getting 3-5 Mbps. I have tested the ethernet on my laptop and the speeds are fine leaving me to believe that this is a software/kext issue. I have installed the AppleIntelE1000e v 3.1.0 (and subsequently all the other versions).

Any help would be appreciated.

I have a Gigabyte H87 D3H, intel i3 Haswell

Thanks

 

[Coonaps]

Same here on a Gigabyte Z87x-D3H. I get painfully slow write rates to my NAS. It starts writing fast and then slows down at around 1,8 gb and takes hours to complete from there if it ever does.

Any ideas?

 

[icecoldart]

I have the same problem, the internet connection is painfully slow.
Asus Z97-C board.

EDIT: I'm not sure what's going on, did another Multibeast build and the speediest shows the proper speed again.