Check the power connector for cracks in the solder to the pcboard. Check the voltage at the drive under load if possible or atleast check to see if there is a voltage dip when runn…
leosadv,
Specifically which Mac OS are you trying to use this card under, Mac OSX 10.3 or Mac OS 9.2.2? If it's 9.2.2, you could try and see if the card is compatible with the Or…