Hello, actually we are using all Intel Motherboards.
We have ran this card in two motherboards the S2600WT and he S2600KP. We previously saw this issue with Windows 2012 R2 in the S2600WT, we RMA'd the card and thought it was a fluke but now are seeing it again with the S2600KP and Windows 7 Embedded.
It is becoming an issue not just a one off. We do have several units that the card is working fine but we believe it is only a matter of time before we see more cards with this issue and would like to find root cause to assure it won't happen again.