hi everyone, i was having exacvlt the same problem with our new hp dl160 G5, 2 processors, 16 GB Ram, it would core dump in under a minute once it had booted, solved the whole problem by removing the DVD drive that we had got to work with it, strange solution but it works and hope it helps some of you others who are having problems. I spent ages reading the forums trying to make it work, updated all the firmware, one other thing dont install the version of esxi with the hp tools on it - that doesnt work with this model properly even with the DVD drive removed.