Intel DH77DF Technical Product Specification - Page 19

PCI Express x16 Graphics

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Product Description 1.3.1.2 PCI Express x16 Graphics 3rd generation Intel Core processor family processors support PCI Express 3.0, 2.x, and 1.x and 2nd generation Intel Core processor family processors support PCI Express 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 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 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 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 Refer to http://www.pcisig.com 19

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Product Description
19
1.3.1.2
PCI Express x16 Graphics
3
rd
generation Intel Core processor family processors support PCI Express 3.0, 2.x,
and 1.x and 2
nd
generation Intel Core processor family processors support PCI
Express 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
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
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
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
Refer to
PCI Express technology