Tak vážení přímo od Herculesu:

Dear Customer,

The card itself is a 3.3 volt card, but is compatible on most 1.5volts board. If you out the card in and see it doesn't not boot up. Go into the Bio, change the AGP mode to 2x, and try it this way.

Regards,
The Hercules Support Team
http://us.hercules.com
514-279-9911

Zde přímo z PowerVR FAQ
Kyro and PowerVR FAQ
Downloaded from www.PVRGenerations.co.uk
Q: Are any of the current Kyro 2 boards able to work in a 1.5v AGP slot?


KYRO II cards are designed to work in 3.3V systems, universal systems and 1.5V only systems. For maximum compatibility, the cards use 3.3V signalling in both 3.3V and universal systems and 1.5V signalling in 1.5V systems. The TYPEDET# signal (A2) floats irrespective of the motherboard type, but the card uses the Vddq supplied by the motherboard to select whether to use 3.3V or 1.5V signalling.

This design has undergone extensive testing with no electrical reliability issues.

Takže Kyro2 pracuje i pod 1.5V-důležité je napájení !!!Klidně ji vražte do AGP4* slotu.