EVGA Z270 FTW-K Initial Installation page 22

EVGA Z270 FTW – K (132-KS-E277)
clear CMOS button will normally allow you and your system back into the
default BIOS.
22. Debug LED / CPU Temp
This is a two-digit POST code reader, displaying in hexadecimal, which means
the characters available (when working as intended) are 0-9, A-F and has a cap
of 255 characters. The POST codes are listed in the troubleshooting section on
Page 147. After the system boots, it will display the temperature in Celsius.
This temperature is specifically for the CPU socket, which will typically read
slightly higher than a given CPU core. To read this temp in Fahrenheit, take the
value in Celsius, multiply by 9/5 (or 1.8) and add 32.
23. USB 3.0 Headers
The USB3.0 headers are used to connect additional USB interface plugs to the
motherboard; these headers are most often used to connect the motherboard to
the chassis to enable the USB3.0 ports on the chassis. These will function the
same as the USB3 ports found on the motherboard's hardwired I/O hub, but
these can be used to attach to front panel USB, auxiliary ports that mount in the
card slots, and also some devices that directly connect to the header.
USB 3.0 standard is 900ma @ 5V for unpowered devices. If your USB device
requires more power than this, it is recommended to attach a powered USB
Hub.
USB 3.1 Type-A (found on the I/O Hub) shares the power limit of USB 3.0 at
900ma @ 5V. Whereas USB 3.1 Type-C (also found on the IO Hub) has a
power limit of 3000ma (3A) @ 5V.
24. USB 2.0 Headers
The USB2.0 header is used to connect additional USB interface plugs to the
motherboard; these headers are most often used to connect the motherboard to
the chassis to enable the USB2.0 ports on the chassis. These will function the
same as the USB2 ports found on the motherboard's hardwired I/O hub, but
these can be used to attach to front panel USB, auxiliary ports that mount in the
card slots, and also some devices that directly connect to the header.
USB 2.0 standard is 500ma @ 5V per port (header total is 1000ma) for
unpowered devices. If your USB device requires more power than this, it is
recommended to attach a powered USB Hub.
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