Sure DL380? It's a Intel model.
Seems you have a single CPU... correct?
Have you verify that RAM DIMMs are populated in the right way?
Using the HP diagnostic CD will check your hardware for issues. The screen image you posted would usually indicate a hardware issue.
When you have things working again:
Using the SSD disk just for booting ESX is a waste of a fast disk. I would have a look at using it for things that can aid performance. http://www.techhead.co.uk/vmware-esxi-vswapping-with-sandforce-ssds