the first 670 I receive do not work use HDMI . no biggie , I just use DVI instead , however it red-screen on I twice . rmae it through amazon , have a second one go to I ... the second card be worse . it keep give I driver failure message nomatter which driver I install or how many time I clean the old driver use sweeper . it would also black screen every couple of minute . found lot of other have problem with the 670 online as well . I only get the 670 because the 680 be always out of stock , or people be ask way too much over retail . I be lucky enough to snag a 680 superclocked today for retail price while I be on amazon rmaing my second card . Problem solve ! ca not wait for my 680 to get here . system : i7-930 Asus p58d mobo corsair h50 6gb of Gskill memory corsair 750w p crucial m4 128gb ssd