I need ethernet adapter with two 1000LX interfaces in modern chip 82576 or better.
In search i found Intel® PRO/1000 MF Server Adapter - LX, but it is an old chipset, without the support queue.
Perhaps there is an adapter 10G compatible with the module SFP 1000LX.
You should consider the Intel® Ethernet Server Adapter X520-LR1, E10G41BFLR. This is a single-port adapter that comes with an optical module installed that supports dual rate 10GBASE-LR/1000BASE-LX. As a bonus you will already have 10-gigabit capability if you want it later.
Another option to consider would be to get an Intel® Ethernet Server Adapter X520-DA2, E10G42BTDA, without any optical modules installed. You could buy the Intel® Ethernet SFP+ LR Optics, E10GSFPLR, for the port you wanted to use for LX, and then have a left-over 10-gigabit port that you could use for either direct attach or buy an opitcal module for that port too.
Check out http://www.intel.com/support/network/adapter/pro100/sb/CS-030612.htm Which SFP+ modules, SFP modules, and cables can I use with the X520 Series? for more details on what you can do.
I hope this helps.
I forgot to mention in my first reply that Intel does not have any gigabit only LX adapters except for the Intel(R) PRO/1000 MF Server Adapter (LX), which has been http://qdms.intel.com/dm/d.aspx/D2687893-5698-4AEE-A4A0-920FC634922E/PCN110787-00.pdf discontinued.