Hi
You should always do a fresh OS installation whenever you do any major sort of change to the hardware at all. Your rebuild would definitely fall into that category. Not only that it gets rid of any old rubbish that has built up over the time of use before and makes it leaner and meaner.
I would advise you to take this opportunity to update your BIOS with the latest version using
QFlash making sure that you use the option to Disable
Keep DMI Data on the home page when running it. Afterwards load
Optimised BIOS defaults