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Pci-e slot peformance

post #1 of 11
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I just recently got some aftermarket cooling for my gtx 480s. My mobo has 3 pci-e 2.0 slots and with the new cooling set up I can no longer have both cards in the blue 16x pci-e slots. In the manual it says that the third gray slot is a 8x pci-e slot. That being a lower performance slot will my gaming performance decrease?
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post #2 of 11
It will not be a noticeable decrease in performance, current graphics cards do not take full advantage of x16 pcie speeds.
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post #3 of 11
According to most people the difference from 16x 2.0 and 8x 2.0 is barely noticeable so I'd say go ahead and try it
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post #4 of 11
There's no discernible difference.
post #5 of 11
Like they said not much of loss of performance in reality.
 
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post #6 of 11
Difference between 16x and x8 is %4 with a 6990. You will be FINE.
 
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post #7 of 11
16x and 8x are fine, it's x4 you need to start worrying about.
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post #8 of 11
Quote:
Originally Posted by jellis142 View Post
16x and 8x are fine, it's x4 you need to start worrying about.
Nope, that's a %6 performance difference between x16 with a 6990.
 
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ThinkPad W510
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The Arkbird
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CPUGraphicsRAMHard Drive
i7 3840QM Quadro K2000M 4x8gb Intel 525 Series 240gb mSATA 
Optical DriveCoolingOSMonitor
Tray-load DVD Factory Windows 7 Pro 1080P "Ultrasharp" panel 
KeyboardPowerCase
Integrated Big 'ol brick M4700 chassis 
CPUMotherboardGraphicsRAM
i7 820QM 4318-CTO Quadro FX 880M 4x4gb 
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X-25M G2 DVD Stock Arch x64 
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1080P touch screen IPS Clicky Brick Adapter UltraNav 
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post #9 of 11
It depends on the resolution you game at. At 1920x1080 you won't notice a difference between 16x and 8x. But if you game at huge resolutions, the bandwidth limitations of 8x may become more pronounced.
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My System
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post #10 of 11
It will take 2560 x1600 to notice a difference between 16x and 8x. Here is a good link to get you started with the results between the two.
http://www.hardocp.com/article/2010/...x16_vs_x16x8/1
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