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post #31 of 43
The PSU is MORE than enough for Crossfired 5830's, and overclocking on everything you've got.

Dropping down to 4x PCIe mode, with a 5830, you'll see maybe 5% performance loss at worst case scenario. The performance gained from going crossfire will outweigh the loss from the 4x slot. So you're fine there too.
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post #32 of 43
Quote:
Originally Posted by pioneerisloud View Post
The PSU is MORE than enough for Crossfired 5830's, and overclocking on everything you've got.

Dropping down to 4x PCIe mode, with a 5830, you'll see maybe 5% performance loss at worst case scenario. The performance gained from going crossfire will outweigh the loss from the 4x slot. So you're fine there too.
not even, more like a MAX 5 FPS difference, there was a LinusTechTips video where he tests video cards at different bandwidths from dual x16 to x1 mode
    
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post #33 of 43
I'd sell the 5830 and get a 6950, but that's me...
IIRC a 5830 uses in-between a 5850 and a 5870, so it might work, but you would be cutting it awfully close...
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post #34 of 43
Thread Starter 
OK, 2nd 5830 is here, but i think the x4 bottlenecks...
In F1 2010 my 2nd card works 99% and the first ~30% and i get a terrible result. FPS says 30 but it feels like 10. What can i do?
Is it the PCI-E x4?
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post #35 of 43
Quote:
Originally Posted by tasospaok123 View Post
OK, 2nd 5830 is here, but i think the x4 bottlenecks...
In F1 2010 my 2nd card works 99% and the first ~30% and i get a terrible result. FPS says 30 but it feels like 10. What can i do?
Is it the PCI-E x4?


Probably, What drivers are you running?
post #36 of 43
Thread Starter 
11.7 , latest from AMD site.
But, in 3DMark Vantage i got 90-99% from both GPUs but only got +10fps
Edited by tasospaok123 - 8/2/11 at 9:50am
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post #37 of 43
Thread Starter 
Please, i need urgent help here.
Is there something that i can do?
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post #38 of 43
Quote:
Originally Posted by tasospaok123 View Post
Please, i need urgent help here.
Is there something that i can do?
Did you put the PCI bridge on? Did you enable CF in the manual?

This maybe a slim chance, maybe your CPU is bottleneck your CF GPUs... slim but possible.
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post #39 of 43
Thread Starter 
I had the bridge on, i enabled CF, i don't think it was the CPU. As i said, i had 30fps but felt like 10, so i think it was the lack of bandwidth.
I returned 2 days ago to the store an now i am now waiting for a 6870 Hawk
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post #40 of 43
Quote:
Originally Posted by tasospaok123 View Post
I had the bridge on, i enabled CF, i don't think it was the CPU. As i said, i had 30fps but felt like 10, so i think it was the lack of bandwidth.
I returned 2 days ago to the store an now i am now waiting for a 6870 Hawk
Welcome to the wonderful world of SLI / Crossfire setups! That, is called microstutter, and its a perfectly normal occurrence on multiple GPU setups.
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