STEVEDRI Posted May 17, 2010 Posted May 17, 2010 i have these 2 cards . can i do crossfire ? i have mobo asus crosshair 3 Share this post Link to post Share on other sites More sharing options...
InCrYsIs Posted May 17, 2010 Posted May 17, 2010 i have these 2 cards . can i do crossfire ? i have mobo asus crosshair 3 Yes, but the 5850 will be clocked down if I'm not mistaken. http://game.amd.com/us-en/crossfirex_about.aspx Share this post Link to post Share on other sites More sharing options...
STEVEDRI Posted May 17, 2010 Posted May 17, 2010 Yes, but the 5850 will be clocked down if I'm not mistaken. does n t matter . its better two cards than one Share this post Link to post Share on other sites More sharing options...
InCrYsIs Posted May 17, 2010 Posted May 17, 2010 does n t matter . its better two cards than one I believe there is a chart on that page. You may want to check it out. Share this post Link to post Share on other sites More sharing options...
STEVEDRI Posted May 17, 2010 Posted May 17, 2010 I believe there is a chart on that page. You may want to check it out. i have seen the chart and it doesnt have 5830.... perhaps its old....thanks Share this post Link to post Share on other sites More sharing options...
Rofltroll Posted May 18, 2010 Posted May 18, 2010 Crossfire works but it'll be like having 2 5830 which is still better than a single 5850. Share this post Link to post Share on other sites More sharing options...
Krieg1337 Posted May 18, 2010 Posted May 18, 2010 I was told on the HD5 series it doesn't downclock anymore. As in, the two cards work together as one big card but do not downclock(One just does more work, the better one). Someone needs to confirm this though? Share this post Link to post Share on other sites More sharing options...
Rofltroll Posted May 19, 2010 Posted May 19, 2010 I was told on the HD5 series it doesn't downclock anymore. As in, the two cards work together as one big card but do not downclock(One just does more work, the better one). Someone needs to confirm this though? Confirmed : http://hardforum.com/showthread.php?t=1460699 and i quote "so you can use hd 5850 with hd 5870, it will actually give you better performance than two hd 5850's, however it was a different case with hd 4850 and 4870, they both had literally the same number of shaders and the only difference was the clock speed, so thats why it didn't really get that much performance boost of two hd 4850's" Apparently in the ATI FAQ it states that hybrid crossfire doesn't downclock anything. Interesting ... Share this post Link to post Share on other sites More sharing options...
Krieg1337 Posted May 19, 2010 Posted May 19, 2010 Confirmed : http://hardforum.com/showthread.php?t=1460699 and i quote "so you can use hd 5850 with hd 5870, it will actually give you better performance than two hd 5850's, however it was a different case with hd 4850 and 4870, they both had literally the same number of shaders and the only difference was the clock speed, so thats why it didn't really get that much performance boost of two hd 4850's" Apparently in the ATI FAQ it states that hybrid crossfire doesn't downclock anything. Interesting ... I am pretty sure SLI downclocks but Crossfire does not Share this post Link to post Share on other sites More sharing options...
Speedway Posted May 20, 2010 Posted May 20, 2010 I am pretty sure SLI downclocks but Crossfire does not Hmmm....As was said, I know for a fact, that the 4xxx series cards downclocked for sure, no doubt, as just being bored I CF a 4830 and a 4870. It was just like playing with my 2 x 4830 setup I had. I also know that ATI made this fact very well known! Here is the most updated chart http://game.amd.com/us-en/content/images/crossfirex/CF_combo_chart.jpg But, I have not seen a review or benchmark anywhere that proves that a "Same Series" "Different Card" Crossfire setup like a 5830 x 5880 or x 5870, will not downclock to the lesser card. I thought this was a well known fact in the ATI world. Nothing has ever been proven otherwise, as I have done a lot of research on this topic. Now, even though the CF setup with say a 5830 x 5850 will downclock to immitate 2 x 5830, you can OC the 5830 to match the 5850's stock clocks, and try to squeeze every bit of performance you can out of this type of setup. But 2 x 5850 will still always be able to OC more, so no matter what you can't get them to equal in the end by OCing! Also, even though they are obviously CF capable, doesn't mean they will scale well together. Scaling is the most important aspect of CrossFiring! I wish my 5870 x 2 setup scaled the way my 5770's do, wow, that would be freaking awesome! Also the other forum linked in this thread had it's last post 7 months ago, and ATI has been pretty steady with a driver update every month for awhile now, so, yo can't really trust a post commenting on a subject we are discussing today using ATI drivers from 7 months ago! We all know the history ATI has had with driver issues But to the OP, YES, you can CF these 2 cards! Share this post Link to post Share on other sites More sharing options...
bernardv Posted May 21, 2010 Posted May 21, 2010 5830 has less shaers but it has a HIGHER clock than 5850. So much for downclocking. Stick it in, bench it and let us know. Share this post Link to post Share on other sites More sharing options...
STEVEDRI Posted May 23, 2010 Posted May 23, 2010 i crossfire 5850 and 5830 and here the results... on xp sp3 the 5830 is disable...!!!! and in windows 7 they are in crossfire but in games crashes... so i think that or the drivers are suck, or these cards are very diffrent to crossfire (shaders, megaherz, etc) perhaps i sell the one card... Share this post Link to post Share on other sites More sharing options...
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