How Unreliable can Crossfire be?

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spat55

spat55

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When the HD 8xxx series arrives, I think I will crossfire my HD 7850 2GB model, as I am getting a 1440p monitor. Hopefully I can get it for £80 new then :).

Thing is what problems should I face? Like it being unsupported in certain games, micro-stuttering etc.
 
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iyzik
Unreliable? Not very.
Microstutter? Very.

Crossfire has some definite problems with lots of games. I personally have CF 7970s and they microstutter like hell in Skyrim, and they have a lower minimum fps than a single GTX 680 in BF3!
As for support I have only had one problem and that was Skyrim, which seems to be still not fully supported. I assume because of how crappy of a console port it is. Aside from that it has been supported on every game I've played.
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Jul 27, 2010
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Crossfire has been taking a major beating lately, particularly in the recent 7990 reviews (which is still Crossfire on a single PCB). The problems generally involve two issues: 1) Lack of proper driver support for games leading to poor performance; and 2) Stuttering gameplay with uneven frame delivery, latency, and inflated FPS performance numbers that make it look like performance is better than it actually is.
 
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iyzik

iyzik

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Unreliable? Not very.
Microstutter? Very.

Crossfire has some definite problems with lots of games. I personally have CF 7970s and they microstutter like hell in Skyrim, and they have a lower minimum fps than a single GTX 680 in BF3!
As for support I have only had one problem and that was Skyrim, which seems to be still not fully supported. I assume because of how crappy of a console port it is. Aside from that it has been supported on every game I've played.
 
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spat55

spat55

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I'd hate the drop in FPS, I would like a continuous FPS of 60 in an ideal world, as no IPS monitors except oc'ed ones do more. Depending on how cheap a 7850 is later on I might just give it ago with cheaper cards so I can try it myself.
 
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However, we've also seen many games that do not scale well, and they make up a significant portion of our tests. Out of eighteen titles, five did not scale, or worse, showed negative scaling. These are not small titles, but big AAA games: Assassin's Creed 3, Batman: Arkham City, F1 2012, StarCraft II, Skyrim, and World of Warcraft. What really surprises me is that this long list is the same as the one we had with our reviews of HD 7990 "New Zealand" implementations by board partners, like the ASUS ROG ARES II and PowerColor Devil 13. So either AMD does not care or can't fix CrossFire support with these games millions of people play.
http://www.techpowerup.com/reviews/AMD/HD_7990/31.html
Click to expand...
 
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spat55

spat55

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I think that sometimes it can be where games are ported from console, which uses one GPu?
 
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