Crossfire slowed down performance in Assassin's Creed Syndicate (Radeon 6850)

Scraniel

Honorable
May 2, 2012
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Hi folks,

I recently bought an additional Radeon HD 6850 card to Crossfire with my existing card.

I intended to speed up Assassin's Creed Syndicate (previous to which I had been playing with a single card on the lowest settings), but to my unfortunate amazement, Crossfiring made the game choppy and skippy. When I disable Crossfire, I get much improved smooth performance.

Here are my system specs:
Motherboard: Gigabyte Z77-D3H
- has PCIe x16 and PCIe x4
CPU: Intel i5-2500k Sandry Bridge 3.3GHz
Memory: G.Skill 8GB DDR3 SDRAM
PSU: Seasonic X-Series 560W

My Assassin's Creed Syndicate settings:
-All low settings
-Ambient Occlusion: SSAO
-Anti-Aliasing: FXAA

Even when lowering the resolution to 1280x720 and turning Vsync off, I still get unplayable choppiness.

Oh, and I have the latest versions of AMD Catalyst Control Center and the drivers (15.7.1).

I'm a newbie to video card tinkering, so I would appreciate any advice. Could I be doing something wrong? Am I missing some settings that I should be adjusting?

Thank you!
 
Solution
that could be because those cards are as old as a dinosaur and xfire support probably isnt really supported very well for that old of a card. Honestly spending money on that 2nd card was more of a waste for you. Hopefully you didnt spend to much on it. Upgrading to something like a 280x or 380 would have been a better choice.
that could be because those cards are as old as a dinosaur and xfire support probably isnt really supported very well for that old of a card. Honestly spending money on that 2nd card was more of a waste for you. Hopefully you didnt spend to much on it. Upgrading to something like a 280x or 380 would have been a better choice.
 
Solution