EVGA Z270 FTW-K Initial Installation page 23

EVGA Z270 FTW – K (132-KS-E277)
25. Backlit Audio Traces
Isolating audio traces reduces or eliminates electrical noise from the onboard
audio when running multiple devices at a very high frequency. The
combination of CPU and graphics card frequencies and/or SLI can cause static,
channel crosstalk, or other audio anomalies. Each channel's traces are isolated
from other sources of electrical noise on the board, which improves sound
clarity. From there the traces are backlit to show the isolation path.
26. Front Panel Audio Connector
This is a motherboard header, which is used to plug in the audio cable
originating from most PC chassis to allow audio to be recorded from or played
through the audio connectors on the chassis. This header has a connector that
looks similar to USB2 and will use the standard "HD Audio" jack. Some
systems may have two headers: one labeled HD Audio, and one labeled AC'97
– this header is not compatible with AC'97.
27. S/PDIF Out
S/PDIF headers are used for audio pass-through, which is used on some older
video cards, video capture cards, and some older generation devices. This port
is not widely used now, but is here in case a legacy item requires the connector.
Most of the audio data is pushed through the bus now, and does not require an
external cable. NOTE: This is a S/PDIF Out connector, and cannot operate to
record data from an external device.
28. Front Panel Connectors
The Front panel connectors are the four main chassis connections. These
include the Power Switch, Power LED, Reset Switch, and HDD LED. The
Power and Reset switches are both designed to use "Momentary Switches,"
rather than "Latching Switches," which means the connection between the two
posts needs to be made just briefly for it to work, as opposed to being held in
place. This is why the Power and Reset switches can be triggered with a screw
driver by simultaneously touching the + and - posts.
Power LED will power on with the system, indicating the system is on and can
blink with CPU activity.
HDD LED will blink during access to the SATA ports; this is not activated for
M.2 SSDs.
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