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Can I put PCI Express 8X into a PCI 16X slot?

Posted on 2010-08-17
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Last Modified: 2013-11-09
I have an adaptec raid card that is PCI Express 8X. My motherboard has video onboard and two PCI Express 16x slots. The card fits but i don't want to turn on the server. Will PCI Express 8X work in a 16x slot? Or are x16 pci-e slots just for video?
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Question by:FTGE
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ploftin earned 125 total points
ID: 33457005
Yes.  8X will work in a 16X slot.
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by:PowerEdgeTech
PowerEdgeTech earned 125 total points
ID: 33457267
With PCIe ... if it fits, it will work.  (System and OS compatability is another story.)
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by:Rant32
Rant32 earned 125 total points
ID: 33457478
Even if it doesn't fit, it will sometimes work :)
PCI Express will negotiate the transfer speed depending on the available number of lanes, in this case limited to 8x.
http://en.wikipedia.org/wiki/PCI_Express#Physical_layer
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by:PowerEdgeTech
ID: 33457497
Yes ... I've heard some pretty good stories! :)
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_ earned 125 total points
ID: 33460399
As an added note, you might need to use the second slot. The first slot is usually for a video card, and doesn't always play nice with a non-video bios.
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by:PowerEdgeTech
ID: 33707967
I'm sure it was just an oversight that I wasn't included in the points?
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by:_
ID: 33750500
Thank you much.    : )
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