"The printed circuit boards on both power supplies look identical but there are some differences. The values of two main smoothing capacitors in the top left hand corner are different on both boards and there are differences on the secondary side on the right hand side. These differences are good to see because it shows the board has actually been upgraded to cater for the higher power. The capacitors are all good quality Japanese branded components of the more welcome 105°C working temperature rating."
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips