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Old Aug 8, 2012, 04:00 PM   #1
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Asus p8p67 and Crossfire Shapphire 7850 OC

Hi,
I have a question, I can do crossfire and get the most performance from them?
Thank you.
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Old Aug 8, 2012, 04:08 PM   #2
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Not quite. The second PCI-e will run at x4 so you will loose some FPS as compared with the more usual x8 x8.
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Old Aug 8, 2012, 04:13 PM   #3
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Not quite. The second PCI-e will run at x4 so you will loose some FPS as compared with the more usual x8 x8.
16x4 with 6950's = roughly 5% performance loss, up to 50%, depending on the game.

PCIE2 slot runs @ x1 link by default, and USB3 uses one of the lanes to make x4 link, so you may also lose other functionality when using both PCIE slots.
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Old Aug 8, 2012, 04:17 PM   #4
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What motherboard would you recommend? Make it cheap.
Thanks.
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Old Aug 8, 2012, 04:18 PM   #5
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Anything with x8/x8 PCIe and cooling on CPU VRM section should be fine.
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Old Aug 8, 2012, 04:20 PM   #6
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ASRock P67 EXTREME4 GEN3 LGA 1155 Intel P67 SATA 6...
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Old Aug 8, 2012, 05:00 PM   #7
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Hi,
I have no access to newegg purchase. I'm from Spain, do you suggest Asrock Z77 Extreme4 ? and would be worth a link to x16? thanks.
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Old Aug 8, 2012, 05:20 PM   #8
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Z77 extreme 4 is good. x8 x8 is fine.
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Old Aug 18, 2012, 11:22 AM   #9
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you will loose some FPS as compared with the more usual x8 x8.




-----------------------
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Uh, that was already said in the first reply, 10 DAYS AGO

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Not quite. The second PCI-e will run at x4 so you will loose some FPS as compared with the more usual x8 x8.
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Old Aug 18, 2012, 11:48 AM   #10
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from my experience with x16 x4 crossfire(6950s) it sucked i was best playing with crossfire disabled
i will never be doing x16 x4 again and would not recommend it to anyone

i got a cheapish board what does pretty nice x8 x8 Asrock extreme3 gen 3 z68
here is a link $86 on newegg
Open Box: ASRock Z68 Extreme3 Gen3 LGA 1155 Intel ...
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Old Aug 26, 2012, 10:15 AM   #11
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from my experience with x16 x4 crossfire(6950s) it sucked i was best playing with crossfire disabled
i will never be doing x16 x4 again and would not recommend it to anyone
Why did it suck? You shouldn't loose much with those cards (as said).
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