I just installed an ATO PSC SCSI controller card that purchased from the Ebay Computer Trade Exchange store. It is supposed to be compatible with OS 10.3 and OS 9. I downloaded the available drivers and firmware from atto.com. Going through the documentation I learned the card should be plug-and-play in most cases, and I did not find any indication I needed to install any software prior to installing the card but my Power Mac G4 (model M8570) crashes immediately after I power it up. I tried installing it in all 4 slots available; same result. I have no way of knowing what version of firmware it came with, but obviously, that is irrelevant at this point. I am by no means an expert, but I'd say I am not a rookie either; I will get it if you get a bit technical. Could anyone please help me out figuring what is going wrong?