Dell VRTX PCIE issues

Hello,

I have a VRTX with two M630 blades (1GB internal  nics).  I have installed two 540-t2 dual port 10GBe nics and mapped them to each blade.  I am running VMware 7.0U1.  The nics are seeing by the hosts and right after blade boot up all 4 10GBe nics are show as "up".  After a few minutes two of the nics (one pcie card) switches to "down" and is no longer working.  In the CMC the second Nic is show as powered on.

This issue happens with both blade.  I have tried different PCIe slots, different fabrics and different 540-t2 cards with the same result.  One of the cards (both 10GBe nics go down).

Am I missing something?

Thanks in advance for the help.