Pci Express X16 Graphics; Usb - Intel DH55PJ Specification

1.7.2

PCI Express x16 Graphics

The Intel Core i7, Intel Core i5, Intel Core i3, and Intel Pentium processors in an
LGA1156 socket support discrete add in graphics cards via the PCI Express 2.0 x16
graphics connector:
• Supports PCI Express GEN2 frequency of 2.5 GHz resulting in 5.0 Gb/s each
direction (500 MB/s) per lane. Maximum theoretical bandwidth on interface is
8 GB/s in each direction, simultaneously, when operating in x16 mode.
• Supports PCI Express GEN1 frequency of 1.25 GHz resulting in 2.5 Gb/s each
direction (250 MB/s) per lane. Maximum theoretical bandwidth on interface is
4 GB/s in each direction, simultaneously, when operating in x16 mode.
For information about
PCI Express technology
1.8

USB

The board supports up to twelve USB 2.0 ports through two EHCI host controllers on
the PCH that allow the use of EHCI-compatible drivers.
The port arrangement is as follows:
• Six ports via stacked back panel connectors
• Six front panel ports via three dual-port internal headers
For information about
The location of the USB connectors on the back panel
The location of the front panel USB headers
Product Description
Refer to
http://www.pcisig.com
Refer to
Figure 9, page 38
Figure 10, page 39
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