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x8 really holding me back?

post #1 of 15
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i have 2 6870's. one is running at x16 and one is running at x8. now i have heard that running at x8 does not acually impead performance but here is my problem. running heaven benchmark, im scoring 1498. According to reviews, 6870's in crossfire (900/1050, while mine are 915/1050) score 1760...so barring a bad card, its gotta be the x8 right?
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Haf of an 2500K
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post #2 of 15
Bottleneck. Overclock that 1055T
post #3 of 15
Hrm... Are you sure that they're not both running at x8? Have you checked with GPU-Z?

The difference between x16/x8 is so minimal you shouldn't even notice it. Almost no difference at all until you get into high end cards and bench.
    
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post #4 of 15
Nope.

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post #5 of 15
Im running 2 6870s at x8 and notice no decrease in performance from when they were running at x16.
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post #6 of 15
It's your x6 dude. It's bottlenecking the hell out of those cards.
    
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post #7 of 15
Quote:
Originally Posted by Blue Destroyer View Post
i have 2 6870's. one is running at x16 and one is running at x8. now i have heard that running at x8 does not acually impead performance but here is my problem. running heaven benchmark, im scoring 1498. According to reviews, 6870's in crossfire (900/1050, while mine are 915/1050) score 1760...so barring a bad card, its gotta be the x8 right?
What are your heaven settings?
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post #8 of 15
Here's a frequency scaling example for a single 5870.



Can you hear it? your CPU is crying. Overclock it, please.
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post #9 of 15
I can confidently say that you're not losing more than 5% performance due to the x8 link.

Overclock that processor.
   
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post #10 of 15
i ran my GTX 580 in x8 mode when i used a GTX 260 as physx, and noticed only like 1 fps if that drop on my game benchmarks
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