I have an ASUS P8Z68-VPRO motherboard with snow leopard and lion installed since 4 months(when I bought the mainboard).
All parts of motherboard are working perfectly but I have a problem.The disk with the mac is WD 500gb sata II.When I try to
boot from this disk with the chameleon,it doesn't boot and a "_" is blinking.I always boot from a boot cd but the cd is slow
and it doesn't allow to change the smbios.This problem,I have it with both mac versions.

PS: on my previous pc,with the same disk and a p35-ds4 gigabyte mainboard,I hadn't any problem like that.

Can you help me??