Back in The Day, figuring out which PC processor was better for gaming was a matter of architecture and clock speed. More megahertz on a fast CPU architecture generally also meant that the CPU would be better for a whole host of tasks, in addition to games, versus a lower clocked chip. An Intel Pentium II 450 MHz was faster than a Pentium…

Source: Hot Hardware – How Many CPU Cores Do You Need For Great PC Gaming?