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How to crossfire?

Last response: in Graphics & Displays
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September 9, 2010 1:52:24 PM

Hello,

I read the FAQ and many articles, but....

I see two bridge connector on each card. Do I match them up, it would seem likely.

Are there settings CCC?

As far as I can tell, you stick the cards in, bridge the same connectors on each card, turn on the computer, and you're in crossfire mode. Is this correct?

I have 2 x Sapphire 5770 and a P6X58D, Corsair 850W

Thank you.

More about : crossfire

a b U Graphics card
September 9, 2010 2:40:09 PM

Yes, you only need one but they say 2 will give you 1-2 frames per second more.(actually 2nd is for a third card)
Yes, after the OS sees the 2nd card enable it in CCC.
No, it has to be enabled in CCC.
Should be OK.
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a b U Graphics card
September 9, 2010 3:36:32 PM

NOTE: Using two crossfire bridges for two cards can have unpredicitable results!

What mhelm1 said about using two crossfire bridges giving you 1-2 frams per second more is not correct. In some cases it has caused an increase in frame rates, in other cases it has caused a decrease. In my case it actually caused my system to be unstable and my games would crash now and then. I suggest you do a bit of testing to determine if one or two bridges is better.

As for CCC settings you need to select the enable option under crossfire.
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September 10, 2010 6:04:36 AM

Well thank you all for your advice.

I did the crossfire and my case temps went from 32 to 44. With the P6XD58 the two PCIe slots sit almost on top of one another so the cards basically can not breath.

I did a slight over clock and right of the bat on 3dMark I hit 86c and so shut the whole thing down. Prior to the OC, in just stock xfire mode, I saw about a 20% increase in 3dMark scores, not really worth the hassel and expense a this time.

Maybe later if I get a bigger case with better cooling. Or another option would be to try some of the other slots....i suppose i could put one in the 8x slot, though I am thinking that I would loose something there, after all it is only 8x instead of 16x, not that I am sure what that means, hahaha....

Anyway the temps put me way off and for the money, I dunno, like I said maybe later. A bigger case is a plan in a couple of years, the case I have now is to small to take a really monster HSF, so crossfire would be one more reason.

But it was really, really easy to configure. Put the card in, connected the ribbon and booted up the system. Catalyst loaded right away and asked if I want to set up crossfire and stepped me through the setting choices, where were few. I was hoping for more increase performance at a lower power cost. Oh well, it was fun and the card is returnable....

Thanks again. Any comments? Ideas?
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a b U Graphics card
September 10, 2010 11:40:11 AM

When do you get the second monitor?
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a b U Graphics card
September 10, 2010 2:15:56 PM

You have 3xpci-e slots? 16x8x8?
Using crossfire on another pci-e slot shouldn't cause any less performance, since it'll be running at 8x8. Bridge will be long enough though?

*Two bridges connected do cause framerate issues*
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September 10, 2010 2:35:56 PM

Helo Dalta.

That is a good question, and one area I am a bit weak on.

I have 3 PCI 2 slots, all 16x16x1 or 16xx8x8. But I think two are blue and called express and one is gray. The slot size and set up is the same thougn, only the color is different.

So, drat, I am not sure how to answer your question or how to configure these. I thought I'd read that the two blues we 16x and the gray was 8x.

It is a P6x58D.

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a b U Graphics card
September 10, 2010 2:44:54 PM

Top two card slots are X16 and the bottom is X8
With 2 cards in the top two slots both work at X16
With three cards in Top X16 second and bottom slots X8
Only so much bandwidth on the slots
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a b U Graphics card
September 10, 2010 2:54:44 PM

mhelm1 said:
Top two card slots are X16 and the bottom is X8
With 2 cards in the top two slots both work at X16
With three cards in Top X16 second and bottom slots X8
Only so much bandwidth on the slots

He can still crossfire the 16x with the 8x without a real performance loss, right?
Still though, crossfire bridge probably wouldn't reach. Haven't seen too many 16x16x8 mobo's, probably because there aren't many on AMD's side at newegg.
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September 11, 2010 2:35:54 AM

It would fit, but barely. The slots are really close so I guess that is bad, because one and two are too close (the cards partically touch), but good in that from one to five it is reachable.

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September 25, 2010 6:22:47 AM

Best answer selected by jerryl.
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a c 271 U Graphics card
September 25, 2010 6:23:29 AM

This topic has been closed by Mousemonkey
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