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how many crossfire bridges to use / H4770 and X58 chipset

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aquax

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#1
How many crossfire bridges will be needed to crossfire 2x 4770, should I use 2 crossfire bridges or 1?

i7 920
Gigabyte X58
 

aquax

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#3
what will be the difference?

Can I still crossfire with 2 bridges?
 

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#4
You can use 2 if you like,i'm not sure it will make any differance though.
 
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#5
Two or one does not make any (noticeable) difference.
 
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#6
I dont think there is any difference with going with a single bridge. In theory there would be zero preformance gains by adding another bridge.
 

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#7
2 bridges, two tabs for the bridges. Two bridges makes sense to me. ATi says to use two.
 
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#8
the 2nd tab is for 3 or 4 way crossfire

 

erocker

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#10
i think this topic was already posted, search!!
 

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#11
i think this topic was already posted, search!!
I think you are too late to post this unhelpful post since it's been answered in this thread as well. Thanks for the tip. :rolleyes:
 
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#12
You must know better than the people who designed the card! Yes both tabs are used for 3 or 4 way CrossFire, and they are also used for two. Here you go: http://ati.amd.com/technology/crossfire/tutorials.html Read up!
I won't start an argument, so lets say the minimum requirement is one bridge.
If it wasn't designed for usage of only one bridge, then it wouldn't work with only one bridge, would it.
 
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#13
I demand benchmarks to disprove this!!! I say nay, Erocker say yes. Someone needs to do a quick benchmark to put this to rest!
 
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#14
Using one will work. The other slot is for CrossfireX setups with 3+ GPU's, hence why the X2's only have one, they can only do Crossfire with 1 other X2 card.
 
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#15
I demand benchmarks to disprove this!!! I say nay, Erocker say yes. Someone needs to do a quick benchmark to put this to rest!
Okay. I will make a 3dm06 run, GPU tests only. Once with two bridges, once with one.
 

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#16
I demand benchmarks to disprove this!!! I say nay, Erocker say yes. Someone needs to do a quick benchmark to put this to rest!
Benchmarks will probably show no difference. I just know it's probably better to follow the manufacturers instructions.

I won't start an argument, so lets say the minimum requirement is one bridge.
If it wasn't designed for usage of only one bridge, then it wouldn't work with only one bridge, would it.
Again, it's best to follow the manufacturers instructions. I've been using CrossFire since the x19XX series and never had a problem, always followed instructions. Besides why would you want to use just one? Makes no sense to me.
 
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#17
Benchmarks will probably show no difference. I just know it's probably better to follow the manufacturers instructions.



Again, it's best to follow the manufacturers instructions. I've been using CrossFire since the x19XX series and never had a problem, always followed instructions. Besides why would you want to use just one? Makes no sense to me.
Hoo, abort benchmark. Wasn't such a good idea. It worked with my 4850s, on the 90s its unwise...

I used just one on my 50s because I just had one. And finding a bridge here is tough.
 
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#18
Hoo, abort benchmark. Wasn't such a good idea. It worked with my 4850s, on the 90s its unwise...

I used just one on my 50s because I just had one. And finding a bridge here is tough.
hah, I have 7 Crossfire bridges on my desk :D
 
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#19

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#21
If anyone really needs one, I'll ship it international, providing you send me shipping money and a "I'm a PITA" fee :laugh:
 

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#22
Just figured I throw this out there. 2 cards + 1 bridge = max output res with xfire enabled is 1900x1200.
 
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#23
erocker, do you have 4770's?

i do, and there is no difference when i used 1 or 2 bridges.
 

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#24
erocker, do you have 4770's?

i do, and there is no difference when i used 1 or 2 bridges.
Nope, and it doesn't matter. Again I just follow the manufacturers instructions. I doubt it's detrimental to performance. But as MCRL just posted, he had problems with his cards using just one on a benchmark. Why not use two? Do you have problems when you use two? Just don't have two bridges? Don't like to follow instructions? I don't get it, but to each their own. Whatever works I guess.
 
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#25
if 2 tabs were really needed, then xfire with 3 or 4 cards would look like this (having 4 tabs total)

 
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