I answered your PM.
Just to double check:
1) What is the brand and model of your board?
2) Have you try checking with the board vendor for possible driver update from their site?
3) Have you tried updating the BIOS?
4) As this is an onboard NIC, please try contact the board vendor for customized driver and further assistance.
1) the MoBo is an Asrock Z97 Extreme6
2) Yes, it's an old driver but I installed it without any new results
3) Yes, the MoBo already has the last BIOS version
4) I'll contact Asrock