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16/4 Xfire vs 16/16 Xfire

post #1 of 8
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Is there really a big bottleneck between the two, I know SLI there isnt.
    
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post #2 of 8
Quote:
Originally Posted by go.kyuu View Post
Is there really a big bottleneck between the two, I know SLI there isnt.
That statement is incorrect sir.

You do not pass go, you do not collect 200 dollars.
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post #3 of 8
Thread Starter 
I mean 16/16 vs 8/8 in SLI there is no major difference sigh/
    
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post #4 of 8
Quote:
Originally Posted by go.kyuu View Post
I mean 16/16 vs 8/8 in SLI there is no major difference sigh/
There is a difference in some of the newer cards being produced. Depending on what hardware you are attempting to put into either SLI or CF mode, you may or may not bottleneck with bus limitations. Some of the older and first gen CF cards would not use up all of the x16 bandwidth, so companies built board that would CF in x4 or x8 mode, and this was fine for cards at the time. As the cards got, and are still getting more powerful, they need more bus speed to effectively communicate between each other. The bottlenecks are also very dependent on many variables. Using smaller resolutions translate to the cards needing less bandwidth, as they aren't processing much. Using older, less powerful GPUs require less bandwidth, as they GPUs themselves are not fast enough to keep up with the data being fed to them. All in all, it boils down to what cards and what resolutions you will be using.
post #5 of 8
Thread Starter 
say 4850/70s?
    
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post #6 of 8
i would say to fully utilise Crossfire, you will need dual 16x for the latest models. otherwise you wont have access to the full bandwidth.
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post #7 of 8
Thread Starter 
Whats a decent 16/16 Board then, Doesn't need to be fancy, just a decent OC'er. Really don't want spend more than $150..
    
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post #8 of 8
Quote:
Originally Posted by go.kyuu View Post
Whats a decent 16/16 Board then, Doesn't need to be fancy, just a decent OC'er. Really don't want spend more than $150..
my board isnt too expensive, could try find a DS4. gigabyte would be your cheapest bet. im really not a fan of ASUS but my mate has the P5E X38 and has had huge success, pretty expensive though. i think theres a DFI board aswell, but they are usually pretty expensive.

the DS4 X38 overclocks pretty hard actually, i manage 3.6ghz on my quad no worries, @ 1.42-1.43v. have made it further than that, but Crysis kept crashing so i just stopped.
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