rSPI riser card is used to store some information about the server which will help in mother board replacement. You can refer below link for details [URL] 
Hello all, I have an m630 with this part number DP/N 03J4K6. It looks like it is called an SPI or RSPI riser card? Can anyone help me understand the function of this? Thanks again for all the advice. Dave C
DP/N 03J4K6