network adapter looses connectivity and re-enabling power saving options after restart

I have new PC with motherboard ASUS H-81M-K and fully updated Win 7 SP1 X64
I have a problem, that it looses network connectivity after some time, that it not uses network, I assume that NIC goes to power saving mode and cant exit this mode, restart helps
I disabled power saving features of network card and selected max performance power plan in control panel, it preventing the network adapter to enter energy saving mode, but after every restart energy saving options for network adapter are back
I also don't have any group policy settings
How can I permanently disable energy saving options of NIC, and prevent them to go back?
Also, why it don't resume working after it goes to energy saving mode?
Robert-ProdigyAsked:
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ComputerTechieCommented:
Have you tried turning off the power management in the bios to see if issue continues.

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ComputerTechieCommented:
Also check to see if a bios update for your computer.

CT
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