Have ASUS P8P67-M MB .Which cards cards can I SLI . I have a NVIDIA GTX 460 SE installed.
If you currently have a GTX460, then you can only use another GTX460 to SLI.
EDit Sorry, didn't read the other posts. If your motherboard only supports crossfire, then you have to use AMD/ATI cards, so SLI is not an option for you.