EVGA X299 Micro User Manual page 21

EVGA X299 Micro (131-SX-E295)
CMOS Reset Button (On IO Panel)
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
clear CMOS button will normally allow you and your system back into the
default BIOS.
M.2 Socket 1 Key-E 32mm Vertical Adapter (On IO Panel)
M.2 Key-E is largely used for WiFi and Bluetooth cards. Key-E and Key-M
connectors are different, meaning that devices are not interchangeable between
sockets.
This variant is also on a vertical mount, which has an adapter that is slid into
card-bus slot and bolted to the motherboard, then the M.2 Key-E mounts to
the vertical adapter.
* There are two numeric references for PCI-Express: one is mechanical, which is the
actual slot-length footprint, and the second is electrical, which is a reference of how
many PCI-E lanes are routed to the slot.
As PCI Express is designed to be a universal architecture, you can install x1 cards, such
as sound cards or USB controllers into an x16 slot. Many types of cards can use
different amounts of PCI-E lanes, while some applications use only certain parts of a
card, such as compute apps that allow a card to run off of a single PCI-E lane. This is
why there are x16 mechanical slots with x1 electrical PCI-E lane. Using the entire length
of a PCI-E slot is not necessary, nor does it cause an adverse effect to use a shorter
form-factor bus card in a slot that physically can hold a larger form-factor bus card.
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