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ATI HD4870 & HD4850 Crossfire & Mixed Crossfire Performance Review
Posted by Chaos on August 8th, 2008, 02:04 PM

When you think of Crossfire what is the first thing you think of? Performance? Price? Driver issues? Well, if we were back in 2005 when Crossfire was first introduced as a competitor to Nvidia’s SLI, you would have probably said “frustration”. Back then, Crossfire was a mishmash of ultra-expensive “Crossfire Edition” cards, wonky external cable loops and vague motherboard requirements. A lot has changed since then as ATI’s multi-card solution has gradually matured into what some would call a perfect alternative to Nvidia’s SLI. Within the last few weeks we have seen some amazing developments in the graphics card world with the release and subsequent price cutting of many high end video cards. These lower prices coupled with a bevy of motherboards supporting Crossfire has meant that many people are seriously considering a system with a pair of ATI graphics cards. Indeed, in the race to have the fastest computer on the block, many people have gravitated towards dual card setups within the past few years and this trend seems to be increasing as of late.

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8 Comments
A question, can you use 2 different ati boards in crossfire or do both have to be the same. I have a hd3870 and a x1950pro that are both crossfire ready. Would it be possible to use those cards together in crossfire. I also have a LanPartyDK790FX motherboard. Any help would be appreciated. Thanks.
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Nope wont work
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I think you can use any combination but they have to be of the same series like 3800 or 4800...
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Oh yeah but cards before the 3800 series are not CrossFireX supported
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You can put any cards with any cards ... they will be not in crossfire but they will act as additional Monitors support
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you can use same series of cards for crossfire it has to fall in line with that series , ie. 3870 can be crossfired with a 3850 , the combinations here are 3870x2 3870 , 3870x2 3870 x2 , 3870 3850 , 3870x2 3850 , as the 3800 seriees all have the same exact core . same will apply with the 4800 line ups . but remember your crossfire is still only as fast as your slowest card , ie. you have a 4870x2 2 gig card and a 4850 512 meg card your crossfire is essentially 3 4850 cards with 512 megs of memory .
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so whats better...1 4870x2 or a 4870x2 xfired with a 4850?
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