I hope this is the right forum for this question. I have googled and googled and can't seem to find any solid information on what card you need for CrossfireX. I have a IceQ 4870 currently installed in the system. I was guessing you could use the two together since they are 4xxx series cards. When I look in the device manager and such I don't see the onboard video at all. I'm not sure it even works since I hooked up my tv to the onboard video and nothing comes up or out at all.