Yes usually, but since these are Dells, they typically do not remove the CPU codes from their BIOS's.I am sort of amazed they work. On Supermicro boards don't spicy chips normally lose support after the initial retail BIOS?
Also if there is ever Spicy Issues, I have found a quick call to SM to resolve the issue. They have no issue provided pre-release or inital release BIOS versions.
There are also some people that can update a current BIOS with the correct CPU code so you can still run the latest BIOS.