Re: How to enable "hybrid cross fire" on mobo Asrock m3a785GMH/128m?
ATI doesn't mention HD4670 VGA card can support Hybrid CrossFire function.
Please kindly refer to AMD official website for VGA card HD4670 specificaton.
AMD official website
ATI Radeon X2400PRO and HD3450 can support Hybrid CrossFire function with a compatible AMD 7-Series integrated chipset.
Please kindly refer to User Manual page 23 for Hybrid CrossFire support list.
Please check this question with your dealer to make sure if HD4670 VGA card can support Hybrid CrossFire or not.
ASRock Tech Support Staff