I don't believe it has anything to do with your no boot issue, but the missing drivers are from the chipset package:
Chipset drivers are more like identifiers afaik, they have no associated .sys or files.
Here are your devices listed within the appropriate .inf: http://imgur.com/GQUELHW
This message was posted on behalf of Intel Corporation
Please bear in mind you are currently running an Intel® server chipset and the drivers available for your controller are available only through your computer manufacturer. ntel does not provide drivers for Intel® server chipsetrs integrated on Dell computers.