Window xp. i want to kanow does there is any performance difference of a game running on a pc

Question

i want to kanow does there is any performance difference of a game running on a pc using genuine window xp and a pc using pirated win dow xp if yes how?can i install xdr ram in a pc is it available for consumer use?i have heard that by modifying some registry entry pirated win dow xp can be made genuine is this possible