EVGA Z270 FTW-K Initial Installation page 21

EVGA Z270 FTW – K (132-KS-E277)
17. PCI-E Slot x4
PCI-E x4 slot uses up to 4 lanes from the PCH. This slot is typically used for
sound cards, WiFi, USB, or other peripheral cards.
Because this slot uses PCH bandwidth, this will have *NO EFFECT* on the
bandwidth or throughput of the x16 slots used for SLI.
Conflict: The x4 slot shares PCH lanes with the U.2 connector, and while they
can be plugged in simultaneously, their functionality is mutually exclusive. The
selection for PCI-E x4 vs U.2 connector is set within the BIOS.
18. PCI-E Slot x1
PCI-E x1 is the smallest form-factor PCI-E card slot. They are all one lane and
are used for low-bandwidth products.
Conflict: PCI-E slot 3 (PE3) shares one PCI-E lane with Key-E. As a result,
these devices are mutually exclusive and must be enabled/disabled in the BIOS.
19. Power Button
This is an onboard power button, and may be used in place of, or in
conjunction with, a front panel power button wired to the board.
Benching systems, or test benches before final assembly, are best served by
using the onboard power because it removes the need to wire a Power/Reset
button or cross posts with a screwdriver, which is a semi-common practice.
This button provides a safer and easier option than jumpering the Power posts.
20. Reset Button
This is an onboard system reset button, and may be used in place of, or in
conjunction with, a front panel system reset button wired to the board.
Benching systems, or test benches before final assembly, are best served by
using the onboard power because it removes the need to wire a Power/Reset
button or cross posts with a screwdriver, which is a semi-common practice.
This button provides a safer and easier option than jumpering the Power posts.
21. CMOS Reset Button
This button has two main uses: the first is standard practice to clear BIOS and
power on before updating the BIOS, and the second is standard practice when
troubleshooting instances when the motherboard fails to POST, such as after
upgrading RAM or CPU, installing new hardware, a failed overclock, etc. This
button provides a much faster means of resetting than the previous method of
removing power from the board, removing the CMOS battery, and discharging
power to the board. In rare occasions the older method can help; pressing the
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