Intel Desktop Board DZ77GA-70K Technical Product Specification
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Depending on the type of add-in card installed in the PCI Express x16 connector, the
HDMI port will behave as described in Table 5.
Table 5. HDMI Port Status Conditions
PCI Express x16 Connector Status HDMI Port Status
No add-in card installed Enabled
PCI Express x16 add-in card installed
Note: May require BIOS setup menu changes.
1.5.3 USB
The PCH contains up to two Enhanced Host Controller Interface (EHCI) host controllers
that support USB high-speed signaling. High-speed USB 2.0 allows data transfers up to
480 Mb/s. All ports are high-speed, full-speed, and low-speed capable.
The PCH also contains an integrated eXtensible Host Controller Interface (xHCI) host
controller which supports USB 3.0 ports. This controller allows data transfers up to
5 Gb/s. The controller supports SuperSpeed (SS), high-speed (HS), full-speed (FS),
and low-speed (LS) traffic on the bus.
The board supports up to eight USB 2.0 ports and eight USB 3.0 ports.
The Intel Z77 Express Chipset provides the USB controller for all the ports. The port
arrangement is as follows:
• Eight USB 3.0 ports:
Four ports are implemented with stacked back panel connectors (blue)
Four ports are implemented through two dual-port internal connectors (blue)
• Eight USB 2.0 ports:
Four ports are implemented with stacked back panel connectors (two black and
two orange high current charging ports)
Four front panel ports are implemented through two dual-port internal headers
NOTE
Computer systems that have an unshielded cable attached to a USB port may not meet
FCC Class B requirements, even if no device is attached to the cable. Use a shielded
cable that meets the requirements for full-speed devices.
For information about Refer to
The location of the USB connectors on the back panel Figure 13, page 52
The location of the front panel USB headers Figure 14, page 53
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