No one a idea for me
Thank you sage99, one of the server are a dell R410 and has a speed of x16 > http://www.dell.com/us/en/enterprise/servers/server-poweredge-r410/pd.aspx?refid=server-poweredge-r410&cs=555&s=biz
I have not found a special settings for the PCIe bus...?
The document about optimizing the nics i have tryed before without any success, has the X520 cards any hidden bios/firmware settings?
i have not seen on boot for a key to enter, to enter the menu like other hba/scsi/nic card.