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Crossfire questions

post #1 of 12
Thread Starter 
Hello OCN.

So I'm thinknig of making a Crossfire setup. But just got a few questions.

1.
Do I need any special drivers/programs/utilities?

2.
Does it gives any extra performance or something with 2 instead of 1 Crossfire bridge? Because I seen some pictures in here of people having 2 bridges on 2 cards.

3.
Does it matter which of the cards I plug my monitor into?

4.
Also will I be able to OC cards separatly in any program?


Thanks in advance.
Edited by Hokrollo - 3/7/11 at 4:49am
Mr. Cablemess
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post #2 of 12
1. You will need the basic ATI driver suite and if you intend to overclock, an overclocking program.

2. I'm not sure about this, but I don't believe it does.

3. Plugging your monitor into the primary card is better (closer to slot 1, at the top).

4. I also don't have a guaranteed answer for this, but I think while running in crossfire, all cards in the crossfire setup must have the same speed and memory or it will drop everything in the setup down to the lowest link. Mixing a 512mb and 1gb card means it will only use 512mb. Mixing core speeds of 600 and 700 will result in both running at 600.
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post #3 of 12
Thread Starter 
k, well. I'll be using 2 of the exact same Sapphire cards. Was just wondering as 1 of the cards usually gets warmer than the other I heard, if I could overclock the cooler one more:I
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post #4 of 12
1-no you need normal driver.
2-you need 1 brıdge new cards..you need 2 brıdges old cards for crossfire
3-first card better but i think no different
4-you can o/c with same speed and same limit..
    
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post #5 of 12
1. No you just use the same drivers as you normally but also you should get the CAP (Catalyst Application Profiles) for better crossfire compatibility with some games.

2. None at all you only need one crossfire bridge for two cardsyou only need two for trifire.

3. Yes you need to plug the monitor into the primary card.

4. The cards will only run at the same speeds when in crossfire so the maximum overclock will be determined by the lowest overclcocking card in your set up.
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post #6 of 12
Thread Starter 
k, thanks everyone. Ordered my card and hopefully it will make system look bit more "enthusiastic" and give me enough power for my Napoleon: Total War ultra settings
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post #7 of 12
Overclocking in crossfire does not work with MSI afterburner. I tried on days to resolve the issues but to no avail. The best way to overclock in crossfire is the following:

http://www.overclock.net/ati/923129-...l#post12529037

Go to the link that Compudaze found via google. Copy the registry crap the guy did into a notepad and duplicate it, but make sure the folder location for your second entry is 001. Since you got two cards, you need 000 and 001. Save the notepad as .reg file. Now go to your CCC and enable AMD overdrive. Restart and voila ! you got mucho overclocking limits in CCC. Take that you MSI Afterburner - you piece of grandma's crap !!
If you need help or unsure of anything, ask in OCN before you dive in. Also, this method does not give you voltage control. Honestly, I did 900/1400 at stock voltage. But if you really need a higher voltage, then I would recommend using RBE with this method to increase your voltage.
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post #8 of 12
I would put the higher clocked card in the Primary postion so that when you are not using the Crossfire the card will run at the higher speed.

good luck
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post #9 of 12
yeah check which card OCs better, and use it as your primary, or maybe if your 1st 5770 is getting old, use the new one as primary, to take some strain oof the 1st....


since some games don't CF well and there should be more strain on the primary, and I guess watching videos...etc, might not even use the CF at all, but I'm just guessing at that last part.
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post #10 of 12
Thread Starter 
Looking on the OC part I think it won't really matter as my GPU seems after 3 months to have gone kinda tired of my overclocking. It even sometimes at stock glitshes So always something I now will have a new one in terms of a crash
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