What Mac OS are you using?

Please use the most up-to-date drivers from the Nvidia Website for the OS that you are using.
Links on my webpage are direct to the Nvidia Site, but may not be the most up-to-date...

In theory - you don't need the CUDA drivers for catalyst use - but theres no harm in installing them especially if you use the Mac for other purposes other than Catalyst.

Cards sourced from ebay are at your own risk... is it an official Quadro4000 Mac version? Was it sold as working?

Green lines may be either HDCP if you have a non-HDCP display or DA connected (without a parrot) or the card may be faulty?

Quardo Cards are readily available at reasonable prices from a number of official suppliers and you should get a 3 year warantee direct from Nvidia

http://www.nvidia.co.uk/object/produ...00-mac-uk.html

If you're passing Milton Keynes - do drop in and I'll take a look.

Simon