Probably something I've overlooked but I've installed this card with two intel 520. Both are visible in disk utility, I can create the striped raid in ML, boot from USB and install ML on the new raid0. When I reboot I get the chime and nothing further.....tried removing the original boot disk from slot 1 and this made no difference, just sits there white screen. I have nt tried the card in a different slot yet. Can't even get to the startup manager to select USB to boot from. AnyOne any insight.? Cheers.