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Just bought a 2nd 5850...how to x-fire?

post #1 of 23
Thread Starter 
Hi, I have bought a 2nd 5850 card off a fellow OCN member, and am planning to crossfire with my first card.

I am hoping its a simple proceedure to crossfire cards, but just looking for some clarification off you guys first biggrin.gif

I have the x-fire bridge thing (1 of), and have an ample PSU, so is it just a matter of connecting up the 2nd card, bridging both cards and updating drivers?

Am I best wiping the original drivers, and is there a simple way to do that without a reformat?

Also whats the best way to get max performance from a crossfire config?

All advice is welcome!
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post #2 of 23
uninstall your current CCC and CAP's. reboot into safe mode, use driver sweeper to remove AMD (I also like to check nvidia) display drivers. Then turn off the computer, install your second 5850, connect X-fire bridge. Have your screen plugged into the first gpu.
Reboot, and install the driver of your liking (works best for your system) and install the latest catalyst profiles (CAPs).

Newer/older drivers dont run the same on different systems. So play around with them. Id suggest the latest 11.2 and work your way backwards. Im currently running 10.4 with my 5970+5870
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post #3 of 23
Thread Starter 
Quote:
Originally Posted by tlxxxsracer;12890361 
uninstall your current CCC and CAP's. reboot into safe mode, use driver sweeper to remove AMD (I also like to check nvidia) display drivers. Then turn off the computer, install your second 5850, connect X-fire bridge. Have your screen plugged into the first gpu.
Reboot, and install the driver of your liking (works best for your system) and install the latest catalyst profiles (CAPs).

Newer/older drivers dont run the same on different systems. So play around with them. Id suggest the latest 11.2 and work your way backwards. Im currently running 10.4 with my 5970+5870

Thanks!

Looks to be simple enough..

rep+ for you.

Now time for me to do benchies on current setup
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post #4 of 23
your CPU with that OC will bottleneck your 5850CF setup. atleast 3.7ghz OC to reduce bottleneck substantially !!
post #5 of 23
You need to uninstall CCC, etc...
Boot into safe mode and wipe AMD.
Reboot into normal mode and install the drivers that work best for you.

Pretty much what tlxxxsracer said.
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post #6 of 23
Quote:
Thanks!
Looks to be simple enough..
rep+ for you.
Now time for me to do benchies on current setup

Not a problem smile.gif Good luck wink.gif
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post #7 of 23
Quote:
Originally Posted by luches;12890874 
your CPU with that OC will bottleneck your 5850CF setup. atleast 3.7ghz OC to reduce bottleneck substantially !!

You can't really say that, there are too many variables to make a blanket statement. The bottleneck will change based on game, resolution, and in-game settings.
    
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post #8 of 23
Thread Starter 
Thanks for the replies!

Hopefully my CPU is not too much of a bottleneck...as I would never be able to get past 3.4GHz with my current cooler..

I will see if it is, and if I get a decent performance gain from the 2nd card...if not then I will try and sell it
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post #9 of 23
I have a question with this guys. I too have also bought a 2nd card for my rig. Im currently using 11.2 and when I play BFBC2, I lag on the loading screen, but i play at 100+fps. BUT my primary GPU is always running at 99% load, even when minimized... what should I do...???
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post #10 of 23
Quote:
Originally Posted by CCast88;12902939 
I have a question with this guys. I too have also bought a 2nd card for my rig. Im currently using 11.2 and when I play BFBC2, I lag on the loading screen, but i play at 100+fps. BUT my primary GPU is always running at 99% load, even when minimized... what should I do...???

Try previous drivers and see if that will help.
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