Hi, I am getting RX_DMA overrun on our IA64 system with onboard 82559 that causes the last fragment in a multi-fragment packet to be lost. The onboard card shares the PCI bus with many other devices. The same problem does not happen with add-on 82559(does not share PCI bus). Changing the Rx Fifo limit (BYTE1: bits 3-0 of configuration params) does not help. Any suggestion is greatly appreciated. Thanks, Kallol