Option ROM Shadow RAM Allocation error for Intel X520

Hi,

I have recently bought X520 DP 10Gb DA/SFP+ ServerAdapter - Kit to go into Dell PowerEdge R210 II, however, this error message pops up after BIOS initialization and before OS start:

"Plug and play Configuration Error: Option ROM Shadow RAM Allocation error."

Although it can be skipped with key press, I would rather not have this error at all.

Could you please help me resolve this issue?

Thank you.

Regards,

Martin