Bootcamp 5 running hot with fan on all the time

I have a 2012 MBPr running windows 7. I was running Bootcamp 4 and driving two 2560x1440 monitors as well as the laptop display. The fan would only come on with very intensive graphics operations. I just installed Bootcamp 5. When running just the laptop display, everything is fine. However, when I connect the two monitors, the fan starts up and the area above the keyboard gets hot, even with no programs opened.

Has anyone experienced this?

I tried to install a version 4 of Bootcamp, but it will not let you roll back to an older version. Anyone know how to trick the Bootcamp installer to think an older version is installed? Is there a registry value that I can change?