You mean the bus core, and its multiplier settings of the cpu. Obviously the bus speed core of a intel E8400 is going to be lower, but the main other effects of how well a Cpu preforms has to to with the level of on board cache the cpu has. level 1, 2 and 3.
Old cpu will have less of a bus speed frequency. so the memory you fit in the system will be slower. The G480 if it is a laptop has a 3rd gen Intel cpu. so in it`s obviously better.
Has more on die cache, to speed things up and takes less time having to send request`s back and forth to the memory for information or running, executing of programs and alike. in the speeding things an more productive use of the CPU.
They're both Slim Desktops, not Laptops. Thank you for your input.