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Specifics of PCIe cards working together on a dual slot PCIe riser card

Will adding an x1 PCIe NIC adapter to a dual slot PCIe Riser card (x4 link with x8 slot) that already has an x4 SAS controller card on it cause a problem regarding its speed.  In other words, does the x1, x4, x8 determine the speed of the card and if you mix them up on 1 riser card that has dual slots will it follow the slowest speed?

Thanks!
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sliknick1028
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sliknick1028
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_Commented:
It's not suppose to.
As I understand it, the 'speed' is the same on all PCI-E cards. The 1x....16x tells how many 'lanes' the card uses. The more 'lanes', the 'faster' the card. But only because it can send more data at once.

Here's some reading:

Intro to PCI-E
http://www.directron.com/expressguide.html

Explaining PCI Express
http://computer.howstuffworks.com/framed.htm?parent=pci-express.htm&url=http://www.motherboards.org/%3Cbr%3Earticles/tech-planations/1438_1.html
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sliknick1028Author Commented:
Awesome.  Thank you!
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_Commented:
Thank you much.    : )
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