We are trying to complete the development of a high speed image capture card. It is a PCIe card that is channeled into a Dell Precision T1600 workstation via a DataPath PCIe bus extender. Data is dma'd into the Dell. During testing, we found that a rare and irregular spaced latency occurs, for up to 1 ms, during the DMA. The card is to handle large (100GB-1TB sized) image files, and this latency corrupts the resultant "image". We were targeting a T1700 platform for the product until this issue arose. We tested the same hardware using an ASUS motherboard and detected no errors over a 24 period. We've excluded processor loading, etc.
Is this bug possibly already known? Is there a work around?