Summary: I bought 2 HIS 4670's graphics card from Amazon to run in crossfire; one of the cards quit working within 6 months. I called HIS and ask them to mail me a RMA. They said I could print the RMA from their web site. My Brother Printer that was supposed to be warrantied failed to print the RMA but Brother would not honor their waranty; on the $199.00 printer!!!!
Summary: This is an outstanding card for the price. Very fast framerates and comes OC'd out of the box. Looking at a 7.3 across the board with Win 7 Ult. Replaced a 9600GT with this card and performance boost was immediate. Only problem is the cr_ppy drivers and utilities disk from HIS wouldn't work. Four attempts to set up the card using the included disk failed. Finally went to AMD's site and downloaded the latest Catalyst release (11.6) and everything went smooth as silk.
Summary: I haven't tested this yet, but was so shocked to see how cheap it was compared to its competition, I decided to buy it rather than doubling (crossfire in an MSI 890FXA-GD65) my HIS Radeon 5770. I got a defective Diamond board to match and it has to go back, so this model will go in instead, leaving me with a 5790 in my X4 and this in my new X6.