I be excite to upgrade from my 4850 and purchase this card as a replacement . never have any issue with the 4850 , but this card have issue within 10 minute after startup . initially everything be fine , then I launch bf3 , which run beautifully on the highest setting for few minute before suddenly freezing . from then on , the thing would not work correctly . even just use desktop app or watch video , it would start to glitch out . big green line appear , or the screen be suddenly offset , or it just constantly flicker . sometimes it would be normal for a while , then suddenly start bug out and would require a restart . I have make sure to remove my old driver before install the new card , check temp on card and voltage and everything appear normal . contact sapphire support who be no help at all . open a ticket on they website , where the only reply I get be `` try playing another game ? '' when I respond to the tech and explain that I could not even use desktop app so even try a game be not go to happen , he tell I to make a rma request then close the ticket . well I return the first card to Amazon who be awesome enough to send I a replacement card overnight . however , when I put the replacement in , I encounter issue even faster than I do with the first . wipe the driver , reinstall , and even upgrade my motherboard bio and finally I think I have fix it . System be stable for a full day of work . until finally that night I try to play Skyrim and the same issue start happen again , and now they wont go away . so , I guess I 'll be return this one too . my spec : Asus M5A99X Evo Mobo 16gb ddr3 1333 700W PSU I think maybe my power supply be inadequate , but I use this tool to calculate what should be need by my system : -lrb- ... -rrb- accord to that , I only need 600w . even still , I try disconnect component like my dvdrw and sound card , but it make no difference . I 'll probably just return this one and give another brand a try , Sapphire support be pretty useless . UPDATE : give it a 3rd chance and finally get a usable card . have I get a work card the first time around , this would have earn a 5-star review . I have now be use it without any issue for about a month , and this card be awesome . I be give it 3 star though because of the fact that it take so many try to get a work card .