64bit/66MHz in PCI-X slot??

Hi everyone,

    I want to install the Adaptec 2120S RAID card in my PowerEdge 1750, but this RAID card is only support 64bit/66MHz PCI which is not compatible with the 2 PCI-X (64bit/133MHz) slots in my server. Can I still install the RAID card in this server or I should do something different?

thanks in advance!