The reason for my question regarding if your cards are compatible with the IBM xSeries 345 is that Digium states that their cards are not compatable with the IBM xSeries 345 among a few other computers.
Maybe your design is different than Digiums and don't suffer from the same problem causing NMI?
Server Compatibility
The following list of servers are known to be partially incompatible with Digium® hardware. We do not recommend using the following computers to set up an Asterisk® server:
Digium Hardware Motherboard Compatibility
Some server motherboards utilize an onboard Intel e1000 Ethernet controller that can interfere with the operation of Digium's cards. The recommended action for this server is to disable the onboard Ethernet controller and use a PCI-based solution. Also, the MS-7032 (K8T Neo-V/K8M Neo-V) motherboard is incompatible with the TE4XXP using the firmware ending in 164. The problem is that the card will randomly receive interrupts.
Thank you for these information. we do not get such bug report, maybe our user still not have such experiance. but our design use same pci bridge, so i think if you meet some digium incompatible issue, better do not use our cards on same model.