ATI has created a complete piece of garbage with the 6670
5 November 2014
Summary: So I purchased this card to get added into a Crossfire configuration and it turns out, ATI has created a complete piece of garbage with the 6670. My Gigabyte version of this card is equally as bad. If I don't have at least 6 blue screens or crashes per day (with or without Crossfire), I'm having a good day. These cards with this chipset are just bad cards. When put under any stress, they go out of sync with the monitor causing it to black screen.
Summary: I tried to get the HDMI to work with no success. I tried two different working cables and even tried it in my spare machine. The DVI port worked fine, however I purchased this product specifically for the HDMI interface. I returned this product.