C'est n'importe nakoi ce truc
http://www.bloodys.com/phpscripts.php
Athlon XP Processor Identifier (ver 0.8b) - [ No Download ] - [ Demo ]
This script turns the user unfriendly markings from any Athlon XP based processor to human readable information such as CPU frequency, FSB, operating voltage, L1 and L2 cache size, multiplier and so on. One of the most useful function is that the script automaticaly identifies weather the CPU core is Palomino, Thoroughbred (A or B revision) or the newest one - Barton.
Ca test juste le type de cpu que c'est, a part ça je vois pas comment il peut dire si il est downgradé.