Recently experienced PSOD issue on one of my clients. Turns out it was because of the out-dated emulex driver included with ESXi installer.
KB for the issue is already public and you can find more information here:
http://kb.vmware.com/kb/2072254
How to know if your vulnerable:
esxcli software vib list | grep -i elxnet
If your version is below: 10.0.783.13, you need to update!
