Hyper V Host machine PANIC after increasing RAM

Hi 

I have Dell PowerEdge R620 Windows Server 2012 RAM 64GB

In Hyper V I Installed Redhat 6.0 with initial configuration and Redhat installed successfully

I assigned 30 GB RAM and 18 virtual processor to the virtual machine after assigning the host machine not responding 

PANIC: early exception 06 rip xxxxxxxx error 0 cr2 0

and my question  

Is it possible to assign 30 GB RAM hyper v machine if so how it is possible??