Why would that be a problem? it has more wattage than the system needs.
The drivers are my main concern because they can't possibly be from 2006
It isn't about the wattage. A poor quality PSU will not deliver the required amps over the 12v,5v and 3.3v rails no matter how big the number on the side is. Drivers and BIOS files for that motherboard are from 2012 at the earliest so I'm not sure what drivers you're talking about.