User's Manual
Table Of Contents
- Box Contents
- Optional Items
- Z590 AORUS TACHYON Motherboard Layout
- Z590 AORUS TACHYON Motherboard Block Diagram
- Chapter 1 Hardware Installation
- Chapter 2 BIOS Setup
- Chapter 3 Configuring a RAID Set
- Chapter 4 Drivers Installation
- Chapter 5 Unique Features
- Chapter 6 Appendix
Hardware Installation
- 23 -
1-8 Onboard Buttons, Switches, and LEDs
BIOS Switches and BIOS LED Indicators
The BIOS switch (BIOS_SW) allows users to easily select a different BIOS for boot up or overclocking, helping to
reduce BIOS failure during overclocking. The SB switch allows enabling or disabling of the Dual BIOS function.
TheLEDindicator(MBIOS_LED/BBIOS_LED)showswhichBIOSisactive.
2: Backup BIOS (Boot from the backup BIOS)
1: Main BIOS (Boot from the main BIOS)
BIOS_SW
2: Single BIOS
1: Dual BIOS
SB
MBIOS_LED (The main BIOS is active)
BBIOS_LED (The backup BIOS is active)
BIOS LED Indicators:
Before setting the SB switch, be sure to turn off your computer and power supply.
BIOS_SW
SB
MBIOS_LED
BBIOS_LED
1
2
F_USB30
F_U
B_
F_ F_
_
B
BS_
B
SB_
B
_S
S_
_
B
_U
_
B
S
123
123
123
123
1
1
1
1
BSS
S
_S
SSU
1 2 3
S3
BSSS
U
__ 3
F_USB3F
S _
S _
S _
SF
B_
B_
F
_0
S
S
_0F
_F
_
_
__B
U
S _S
_
SF_
B
USB0_B
B_
B_
F_USB3
F_USB303
_
_3U
S_
1
2
F_USB30
F_U
B_
F_ F_
_
B
BS_
B
SB_
B
_S
S_
_
B
_U
_
B
S
123
123
123
123
1
1
1
1
BSS
S
_S
SSU
1 2 3
S3
BSSS
U
__ 3
F_USB3F
S _
S _
S _
SF
B_
B_
F
_0
S
S
_0F
_F
_
_
__B
U
S _S
_
SF_
B
USB0_B
B_
B_
F_USB3
F_USB303
_
_3U
S_
1
2
F_USB30
F_U
B_
F_ F_
_
B
BS_
B
SB_
B
_S
S_
_
B
_U
_
B
S
123
123
123
123
1
1
1
1
BSS
S
_S
SSU
1 2 3
S3
BSSS
U
__ 3
F_USB3F
S _
S _
S _
SF
B_
B_
F
_0
S
S
_0F
_F
_
_
__B
U
S _S
_
SF_
B
USB0_B
B_
B_
F_USB3
F_USB303
_
_3U
S_
1
2
F_USB30
F_U
B_
F_ F_
_
B
BS_
B
SB_
B
_S
S_
_
B
_U
_
B
S
123
123
123
123
1
1
1
1
BSS
S
_S
SSU
1 2 3
S3
BSSS
U
__ 3
F_USB3F
S _
S _
S _
SF
B_
B_
F
_0
S
S
_0F
_F
_
_
__B
U
S _S
_
SF_
B
USB0_B
B_
B_
F_USB3
F_USB303
_
_3U
S_
PW_SW
RST_SW
CMOS_SW
Quick Buttons
This motherboard has 3 quick buttons: power button, reset button and clear CMOS button. The power button
andresetbuttonallowuserstoquicklyturnon/offorresetthecomputerinanopen-caseenvironmentwhen
they want to change hardware components or conduct hardware testing.
Use this button to clear the BIOS
congurationandresettheCMOSvaluestofactorydefaultswhenneeded.
PW_SW: Power Button
RST_SW: Reset Button
CMOS_SW: Clear CMOS Button
• Always turn off your computer and unplug the power cord from the power outlet before using
the clear CMOS button.
• Do not use the clear CMOS button when the system is on, or the system may shutdown and
data loss or damage may occur.
• Aftersystemrestart,gotoBIOSSetuptoloadfactorydefaults(selectLoadOptimizedDefaults)or
manuallyconguretheBIOSsettings(refertoChapter2,"BIOSSetup,"forBIOScongurations).