I don't care about written data since I got some 420W with this kind of print on it : "420W Silent noise killer PSU,Cuport AMd Pent1un 4,... " (true mistakes !!) and doesn't give more than 4.68V in place of +5V in "startup" load, you can believe me the system was unstable at all.
So take your voltmeter and check it by one of the many 5"1/4 PSU connectors !