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6850 Crossfire Low FPS Issue

Last response: in Graphics & Displays
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January 10, 2013 2:41:46 PM

I've recently added another GPU to my system and have enabled Crossfire, the two cards I have are the XFX HD 6850 and the Sapphire HD 6850. I've tested several games and it doesn't seem as if I'm getting the full potential.

Here's my current hardware setup

CPU - AMD FX 8150 3.6GHz (Not-Overclocked)
GPU - 2 X HD 6850's (XFX HD 6850 + Sapphire HD 6850) (Not-Overclocked)
RAM - 8GB Kingston HpyerX Blu 1600MHz
Hard Drive - Maxtor 320GB SATA II
SSD - SanDisk 128GB
PSU - Coolermaster GX650W
Motherboard - ASUS Sabertooth 990FX

I have tried several games maxed out on a 23" 1920x1080 Acer Monitor and get the following results

Black Ops 2 - 30-60FPS
Skyrim - 25-40FPS
GTA IV - 25-40FPS
Far Cry 3 - 20-30FPS
Crysis 2 - 30-45FPS
Battlefield 3 - 25-35FPS

I have the latest AMD Drivers (CCC), both cards are running in a PCI-E X16 2.0 slot, I can't understand why my FPS is so low?
January 19, 2013 10:49:59 PM

I'm runing an setup with AMD FX 8120 and crossfire Asus HD 6870 and XFX 6870 and getting hte same issue. For me the game runs more smooth with one card that with 2. The CPU usage is at max 40%
a c 172 U Graphics card
January 20, 2013 12:26:26 AM

crossfire is a sham. but it sounds like your having driver related issues. when adding a second card you are supposed to totally remove the amd drivers, reboot, reinstall the latest ones and download the application profiles. i sold my 6850 crossfires a month after i got the second card due to issues and bought a single better card, things are much smoother now.
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a b U Graphics card
January 20, 2013 12:31:31 AM

You need to install the catalyst application profiles.

Crossfire 6850s are very good, but don't expect to max out every game.
January 20, 2013 12:32:54 AM

iam2thecrowe said:
crossfire is a sham.

Your a lying troll.
January 20, 2013 1:57:27 AM

sorry can't help but is your monitor a Acer 23.6" HQ245? I have this monitor and after upgrading looking to buy a second
a c 172 U Graphics card
January 20, 2013 6:27:52 AM

Tom Burnqest said:
Your a lying troll.

no im not a lying troll, ive experieced crossfire problems, and just about every other crossfire thread comes to the same conclusion, even on paper you can see the frame latency is double that of a single card, the mirostutter is real, fps drops are real. If that is not a sham, i dont know what is. I am angry at AMD for not fixing this crossfire, it's still buggy in the latest series of cards. They have had plenty of generations to fix it and havn't.
January 20, 2013 7:57:53 AM

Download a GPU monitor (you can get it for the sidebar in windows, obviously make sure you have two instances monitoring both cards)) and make sure both cards are being utilised. Make sure crossfire is actually enabled as well, it has a habit of thinking it's enabled when it isn't and try the application profiles.

When it's setup and working it works well.
!