I checked the VMWAre Compatability Guide and have a bit of confusion regarding what it states.
The machine in question is an HP ProLiant DL380 G7 which it lists ESXi 4.1 Installable as compatible, with a caveat. The caveat states...
This server uses a processor series that requires a 4.0 U1 patch (Release Name - ESX400-201002001, Bulletin ID ESX400-201002401-BG / Release Name ESXi400-201002001, Bulletin ID ESXi400-201002401-BG) or newer for full support.
I located the patch...however it appears this is all geared for 4.0 not, 4.1. In addition if I go download ESXi right now would this not be bundled as part of the download?