IgorsLAB published Arctic P12 PWM PST Revision 1 vs. Revision 4
A quote from the article:
Many readers have already noticed that Arctic sells the popular (because cheap) P12 PWM PST (and not only this) in new revisions. In the meantime, the fan we tested today has reached revision 4 and that alone is reason enough to draw a real comparison.Arctic P12 PWM PST Revision 1 vs. Revision 4