It would depend on what the components are replacing. If you are speaking of upgrading one component of a full system it would be best to list the rest of the system. If for example you already had 16GB of RAM, but it were slower, the upgrade incentive would be almost missing...but if you were replacing a 4GB set of RAM with 16GB, then wow, yes, that'd be wonderful. If your power supply doesn't support it, then perhaps both the CPU core and video card would have to be skipped, but if power is good, those choices could be considered.