99% of AGP4x cards supported 1.5v use, 1.5v was part of the AGP4x standard! BUT a few cards were not 100% compliant with that standard. Unfortunately, some Hercules cards were among the few non-1.5v compliant cards. Had it been an Asus, Creative, Gigabyte, Visiontek, or any of about a dozen other brands of cards with the same chip, it would be OK!
<font color=blue>You're posting in a forum with class. It may be third class, but it's still class!</font color=blue>