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5770 crossfire set running @ 8.x ?

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#1


Isn't there a way to make them both 16x?
 

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#2
not with your motherboard.
 
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#3
So my motherboard is holding it back then? I seen it says it will auto set them in 16x or 8x.
 
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#4
Your card is not set right. You need to push it in more.....;)
 
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#5
Cards are set just fine.
 

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#6
So my motherboard is holding it back then? I seen it says it will auto set them in 16x or 8x.
from your motherboards manual, gigabyte website, and a review:

- If two graphics cards are installed at PCI_E2 & PCI_E4 slots, these two PCIE x16 lanes will auto arrange from x16/ x0 to x8/ x8
- supports ATI® Crossfire™ & NVIDIA SLI
its not holding back your performance one bit.

Your card is not set right. You need to push it in more.....;)

dont tell him that, he'll break something
 

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#7
The performance difference is negligible when running 2 cards at x16 and x8 tbh. I doubt you'd gain much from going to dual x16 if you could. MSI have really come along way with their boards.

:D
 
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#8
Thanks guys.
 

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#9
ive seen alot of motherboard only run CF at x8/x8. some of the newer boards do x16/x16/x8/x4 or x16/x16/x16/x4
 

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#10
ive seen alot of motherboard only run CF at x8/x8. some of the newer boards do x16/x16/x8/x4 or x16/x16/x16/x4
not on P55 they dont - its one of the key differences between P55 and x58.
 
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#11
Not with a i7 860 cpu and p55 mobo .Cpu has 16X pci-e 2.0 lanes if you use 2 cards it will be 8x for each card . And you are lucky most of the p55 motherboards slots working one at 16x and 2nd at 4X (yours is working at 8x 8x at msi p55 gd-65) .
dont worry take a look to 5870 pci-e scaling http://www.techpowerup.com/reviews/AMD/HD_5870_PCI-Express_Scaling/1.html
 
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#12
True it does not show that much of a change.
 

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#13
Told yurh.

;) ;)
 
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#14
The PCIE connection is part of the CPU not the chipset and it is X16 or 2x8x speeds so it had nothing to do with the mobo.
 

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#15
The PCIE connection is part of the CPU not the chipset and it is X16 or 2x8x speeds so it had nothing to do with the mobo.
yes it does. when the motherboard itself states it can only do 16x/0x or 8x/8x, it means thats its limits.


the lanes may be provided by the CPU, but they're still held back by what the motherboard supports.
 

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#17

Mussels

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#18
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#19
Hmm, so you have a 8x and 16x slot only? I'm sure it won't affect that much FPS, if any maybe like 2 FPS , nothing too major...Mine has a 16x and 16x , but obviously my mobo is completely different from yours.