PCI-e 1x , Whats the maximum speed on a Gigabit LAN ?

Could someone let me know whats the max or best speed a PCI-e 1X card can handle on a Gigabit LAN ?  On one of our failed server it had a PCI-X so I know it can do true gigabit, but the replacement server only has PCI-e 1X and PCI slots, I could use one of the regular Intel PRO/100 Server as its hardware based, but am wondering how much a PCI-e can handle ?
Thanks
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DuffyS40Asked:
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gobanCommented:
Yes PCI-e 1X is capable of 1 Gigabit Ethernet, heres why,

1 Gigabit per second = 128 Megabytes per second

PCI-e 1x bus speed = 250Megabytes per second full duplex
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from_expCommented:
here is a good link:
http://en.wikipedia.org/wiki/PCI-X
pci-e 1x as it was mentioned can do 250MB/s

one more thing to note: you have to look at your motherboard architecture. it is possible, that your pic-e is shared between number of devices.
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