You could try RMAing the card with Sapphire (not sure how long the warranty is)?
I tested it in my friend's PC and same thing happened, no HDMI display and DVI output works sometimes but with artifacts in the form of two vertical lines on screen.
On my PC
On my Friend's PC
The card has a warranty of 3 years after purchase and extended two years when you register it online. And my card is barely two years old. I'm gonna RMA it. Can you give me some ideas about how to do it? I'm already a member of Sapphire Select Club and they have an option for support ticket. I'm gonna start there for now. Thanx for replying.
I RMA'd the defective card and got a new one. But the new card runs a little hotter. Overall I'm pretty happy with the replacement. Took only three days to get a new one. Wish I had done it sooner before my birthday. Hehe!