Intel DZ87KLT-75K Specification page 20

Intel Desktop Board DZ87KLT-75K Technical Product Specification
1.3.1.6 PCI Express Graphics
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4 generation Intel Core processors support PCI Express 3.0, 2.x, and 1.x:
PCI Express 3.0 with a raw bit rate of 8.0 GT/s results in an effective bandwidth of
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1 GB/s each direction per lane. The maximum theoretical bandwidth of the x16
interface is 16 GB/s in each direction, simultaneously, for a total bandwidth of
32 GB/s.
PCI Express 2.x with a raw bit rate of 5.0 GT/s results in an effective bandwidth of
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500 MB/s each direction per lane. The maximum theoretical bandwidth of the x16
interface is 8 GB/s in each direction, simultaneously, for a total bandwidth of
16 GB/s.
PCI Express 1.x with a raw bit rate of 2.5 GT/s results in an effective bandwidth of
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250 MB/s each direction per lane. The maximum theoretical bandwidth of the x16
interface is 4 GB/s in each direction, simultaneously, for a total bandwidth of
8 GB/s.
For information about
PCI Express technology
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Refer to
http://www.pcisig.com