EVGA Z270 Stinger (111-KS-E272)
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18. Removable BIOS Chip
The ability to remove and replace the BIOS chip without requiring special tools
is a key feature on many of our boards, by adding a level of protection against
BIOS failures, bad BIOS flashes, BIOS corruption, etc. This feature also allows
EVGA to work with end-users if something happens to render the BIOS chip
unusable or a BIOS update is needed for CPU compatibility; rather than
replacing the whole board, Customer Support can send a pre-flashed BIOS chip
to get you up and running without requiring the end-user to send in the
motherboard. Please see the walkthrough on Page 114 for further information.
19. CMOS Battery
The CMOS battery backup provides uninterruptable power to the BIOS/UEFI
to keep all of the settings; otherwise, each boot would behave like you just reset
the BIOS. These batteries typically last several years and rarely need to be
replaced.
20. 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
21. Rear Panel Connectors (Figure 2)
This is the section referred to as the I/O Hub. This panel contains the
hardwired USB, Sound, and Ethernet connections. Please see Page 15 for a
component level breakdown.
* 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 a 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 a x1 electrical PCI-E lane. Using the entire length of a
PCI-E slot is unnecessary, 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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