There are no "higher" versions.  This is a very very very very very very very OLD system. INTEL changes ram and chipset and sockets and everything else with successive generations of Core I3 I5 I7. Bios should be updated BEFORE changing CPU and with antivirus software UNINSTALLED.  Doing this the other way round bricks the machine. Dell XPS 8500 / Vostro 470 System BIOS. YOU CANNOT JUMP From A03 to A14 in a single step.  
What is the higher Core i7 Processor that I can upgrade on my Vostro 470 Minitower Desktop?   Thanks     [IMAGE]
Vostro 470, best i7 CPU that I can upgrade