Gigabyte B550 Aorus Master Service Manual

B550AORUSMASTER

User's Manual

Rev. 1001

12ME-B55AMST-1001R

For more product details, please visit GIGABYTE's website.

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Copyright

© 2020 GIGA-BYTE TECHNOLOGY CO., LTD. All rights reserved.

The trademarks mentioned in this manual are legally registered to their respective owners.

Disclaimer

Information in this manual is protected by copyright laws and is the property of GIGABYTE.

Changes to the specifications and features in this manual may be made by GIGABYTE without prior notice.

No part of this manual may be reproduced, copied, translated, transmitted, or published in any form or by any means without GIGABYTE's prior written permission.

Documentation Classifications

In order to assist in the use of this product, GIGABYTE provides the following types of

documentations:

For quick set-up of the product, read the Quick Installation Guide included with the product.For detailed product information, carefully read the User's Manual.

For product-related information, check on our website at: https://www.gigabyte.com

Identifying Your Motherboard Revision

The revision number on your motherboard looks like this: "REV: X.X." For example, "REV: 1.0" means the revision of the motherboard is 1.0. Check your motherboard revision before updating motherboard BIOS, drivers, or when looking for technical information.

Example:

Table of Contents

B550 AORUS MASTER Motherboard Layout..................................................................		4
B550 AORUS MASTER Motherboard Block Diagram.....................................................		5
Chapter 1 Hardware Installation......................................................................................		6
1-1	Installation Precautions.....................................................................................	6
1-2	Product Specifications......................................................................................	7
1-3	Installing the CPU...........................................................................................	11
1-4	Installing the Memory......................................................................................	11
1-5 Installing an Expansion Card..........................................................................		12
1-6	Back Panel Connectors..................................................................................	12
1-7	Internal Connectors........................................................................................	15
Chapter 2 BIOS Setup...................................................................................................		24
2-1	Startup Screen................................................................................................	24
2-2	The Main Menu...............................................................................................	25
2-3	Favorites (F11)................................................................................................	26
2-4	Tweaker..........................................................................................................	27
2-5	Settings...........................................................................................................	30
2-6	System Info.....................................................................................................	35
2-7	Boot................................................................................................................	36
2-8	Save & Exit.....................................................................................................	39
Chapter 3 Appendix.......................................................................................................		40
3-1 Configuring a RAID Set..................................................................................		40
3-2	Drivers Installation..........................................................................................	42
3-3	Debug LED Codes..........................................................................................	43
Regulatory Notices....................................................................................................		47
Contact Us.................................................................................................................		52

- 3 -

B550 AORUS MASTER Motherboard Layout

	ATX_12V2	CPU_OPT	D_LED2 LED_C2
USB20	ATX_12V1	CPU_FAN	NOISE_
	SYS_FAN1		SENSOR
M2_WIFI
USB_HDMI USB 2.0 Hub		Socket AM4	DB_PORT (Note)

U32G2_1

QFLED

QFLASH_PLUS

U32G2_2

U32G2C

U32G2_LAN

LED_CPU

AUDIO

	B_BIOS	M_BIOS
Realtek®	110	80	42
2.5GbE LAN
	PCIEX16

	B550 AORUS MASTER
M2A CPU	A1	A2	B1	B2
	DDR4_	DDR4_	DDR4_	DDR4_

BAT

ATX
EC TEMP1	FAN4 SYS FAN5 PUMP	SYS FAN2
	SYS_
CPU DRAM
VGA BOOT

110

80

42

PCIEX4_1

M2B_CPU

AMD B550

CODEC

110	80		42
PCIEX4_2		USB 2.0 Hub
F_AUDIO	LED_C1
D_LED1		F_USB2
Box Contents	EC_TEMP2		F_USB1

M2C_CPU	iTE®
	Super I/O
F_U32	TPM
SYS_FAN3
SYS_FAN6_PUMP

4 2 0 SATA3 5 3 1

CLR_CMOS

F_PANEL

55	B550 AORUS MASTER motherboard	55	One antenna
55	Motherboard driver disc	55	Four SATA cables
55	User's Manual	55	Two thermistor cables
55	Quick Installation Guide	55	One noise detection cable
55	One RGB LED strip extension cable	55	Two Velcro cable ties
55	One addressable LED strip adapter cable	55	One G Connector

*The box contents above are for reference only and the actual items shall depend on the product package you obtain. The box contents are subject to change without notice.

(Note) For debug code information, please refer to Chapter 3. - 4 -

B550 AORUS MASTER Motherboard Block Diagram

PCI Express 4.0/3.0 Bus

x16

Switch

1 M.2 Socket 3

ExpressPCI1x16

ExpressPCI1x8

(M2A_CPU)

2 M.2 Socket 3

or

(M2B_CPU/

HDMI

M2C_CPU)

4 USB 3.2 Gen 2

Type A

CODEC

CPU CLK+/- (100~500 MHz)

DDR4 3200/2933/2667/2400/2133 MHz

AMD Socket

AM4 CPU

SPI

Dual BIOS

Bus

LPC

TPM

Bus

iTE®

Super I/O

PCIe 3.0 x4

x4

1 x PCI Express x4

SpeakerRearOut Center/Subwoofer	MIC Line Out Line In	S/PDIFOut
SpeakerOut

4 SATA 6Gb/s

(SATA3 0~3)

M.2 WIFI

Module

PCI Express 3.0 Bus

x1

x4

x1

Switch

Realtek®

x4

2.5GbE LAN

or

Express

RJ45

LAN

2 SATA 6Gb/s

1 x PCI

(SATA3 4/5)

1 USB Type-C™,

USB 3.2 Gen 2

1 USB 3.2 Gen 2

AMD B550

Type A

2 USB 3.2 Gen 1

USB 2.0

8 USB 2.0/1.1

Hub

2 USB 2.0/1.1

- 5 -

Chapter 1 Hardware Installation

1-1 Installation Precautions

The motherboard contains numerous delicate electronic circuits and components which can become damaged as a result of electrostatic discharge (ESD). Prior to installation, carefully read the user's manual and follow these procedures:

•• Prior to installation, make sure the chassis is suitable for the motherboard.

•• Prior to installation, do not remove or break motherboard S/N (Serial Number) sticker or warranty sticker provided by your dealer. These stickers are required for warranty validation.

•• Always remove the AC power by unplugging the power cord from the power outlet before installing or removing the motherboard or other hardware components.

•• When connecting hardware components to the internal connectors on the motherboard, make sure they are connected tightly and securely.

•• When handling the motherboard, avoid touching any metal leads or connectors.

•• It is best to wear an electrostatic discharge (ESD) wrist strap when handling electronic components such as a motherboard, CPU or memory. If you do not have an ESD wrist strap, keep your hands dry and first touch a metal object to eliminate static electricity.

•• Prior to installing the motherboard, please have it on top of an antistatic pad or within an electrostatic shielding container.

•• Before connecting or unplugging the power supply cable from the motherboard, make sure the power supply has been turned off.

•• Before turning on the power, make sure the power supply voltage has been set according to the local voltage standard.

•• Before using the product, please verify that all cables and power connectors of your hardware components are connected.

•• To prevent damage to the motherboard, do not allow screws to come in contact with the motherboard circuit or its components.

•• Make sure there are no leftover screws or metal components placed on the motherboard or within the computer casing.

•• Do not place the computer system on an uneven surface.

•• Do not place the computer system in a high-temperature or wet environment.

•• Turning on the computer power during the installation process can lead to damage to system components as well as physical harm to the user.

•• If you are uncertain about any installation steps or have a problem related to the use of the product, please consult a certified computer technician.

•• If you use an adapter, extension power cable, or power strip, ensure to consult with its installation and/or grounding instructions.

- 6 -

1-2 Product Specifications

CPU		AMD Socket AM4, support for:
		3rd Generation AMD Ryzen™ processors/
		New Generation AMD Ryzen™ with Radeon™ Graphics processors
		(Go to GIGABYTE's website for the latest CPU support list.)
Chipset		AMD B550
Memory		4 x DDR4 DIMM sockets supporting up to 128 GB (32 GB single DIMM capacity)
		of system memory
	Support for DDR4 3200/2933/2667/2400/2133 MHz memory modules
	Dual channel memory architecture
	Support for ECC Un-buffered DIMM 1Rx8/2Rx8 memory modules
	Support for non-ECC Un-buffered DIMM 1Rx8/2Rx8/1Rx16 memory modules
	Support for Extreme Memory Profile (XMP) memory modules
		(Go to GIGABYTE's website for the latest supported memory speeds and memory
		modules.)
Onboard		Integrated in the New Generation AMD Ryzen™ with Radeon™ Graphics processors:
Graphics		- 1 x HDMI port, supporting a maximum resolution of 4096x2160@60 Hz
		*	Support for HDMI 2.1 version, HDCP 2.3, and HDR.
	Maximum shared memory of 16 GB
Audio		Realtek® ALC1220-VB codec
		*	The back panel line out jack supports DSD audio.
	Support for DTS:X® Ultra
	High Definition Audio
		2/4/5.1/7.1-channel
	Support for S/PDIF Out
LAN		Realtek® 2.5GbE LAN chip (2.5 Gbit/1 Gbit/100 Mbit)
Wireless		Intel® Wi-Fi 6 AX200
Communication		- WIFI a, b, g, n, ac with wave 2 features, ax, supporting 2.4/5 GHz Dual-Band
Module		- BLUETOOTH 5
		- Support for 11ax 160MHz wireless standard and up to 2.4 Gbps data rate
		*	Actual data rate may vary depending on environment and equipment.
Expansion Slots		1 x PCI Express x16 slot (PCIEX16), integrated in the CPU:
		- 3rd Generation AMD Ryzen™ processors support PCIe 4.0 x16 mode
		- New Generation AMD Ryzen™ with Radeon™ Graphics processors support
		PCIe 3.0 x16 mode
		*	For optimum performance, if only one PCI Express graphics card is to be installed,
			be sure to install it in the PCIEX16 slot.
		*	The PCIEX16 slot shares bandwidth with the M2B_CPU and M2C_CPU connectors.
			The PCIEX16 slot operates at up to x8 mode when a device is installed in the
			M2B_CPU or M2C_CPU connector.

2 x PCI Express x16 slots (PCIEX4_1/PCIEX4_2), integrated in the Chipset:

-Supporting PCIe 3.0 x4 mode

*The PCIEX4_2 slot shares bandwidth with the SATA3 4, 5 connectors. The PCIEX4_2 slot operates at up to x2 mode when a device is installed in the SATA3 4 or SATA3 5 connector.

- 7 -

Storage Interface 1 x M.2 connector (M2A_CPU), integrated in the CPU, supporting Socket 3, M key, type 2242/2280/22110 SSDs:

-3rd Generation AMD Ryzen™ processors support SATA and PCIe 4.0 x4/x2 SSDs

-New Generation AMD Ryzen™ with Radeon™ Graphics processors support SATA and PCIe 3.0 x4/x2 SSDs

2 x M.2 connectors (M2B_CPU/M2C_CPU), integrated in the CPU, supporting Socket 3, M key, type 2242/2280/22110 SSDs:

-3rd Generation AMD Ryzen™ processors support PCIe 4.0 x4/x2 SSDs

-New Generation AMD Ryzen™ with Radeon™ Graphics processors support PCIe 3.0 x4/x2 SSDs

6 x SATA 6Gb/s connectors, integrated in the Chipset:

		- Support for RAID 0, RAID 1, and RAID 10
USB		CPU:
		- 4 x USB 3.2 Gen 2 Type-A ports (red) on the back panel
		Chipset:
		- 1 x USB Type-C™ port on the back panel, with USB 3.2 Gen 2 support
		- 1 x USB 3.2	Gen 2 Type-A port (red) on the back panel
		- 2 x USB 3.2	Gen 1 ports available through the internal USB header

-2 x USB 2.0/1.1 ports on the back panelChipset+2 USB 2.0 Hubs:

-8 x USB 2.0/1.1 ports (4 ports on the back panel, 4 ports available through the internal USB headers)

Internal	1 x 24-pin ATX main power connector
Connectors	1 x 8-pin ATX 12V power connector
	1 x 4-pin ATX 12V power connector
	1 x CPU fan header
	1 x water cooling CPU fan header
	4 x system fan headers
	2 x system fan/water cooling pump headers
	2 x addressable LED strip headers
	2 x RGB LED strip headers
	1 x CPU cooler LED strip/RGB LED strip header
	3 x M.2 Socket 3 connectors
	6 x SATA 6Gb/s connectors
	1 x front panel header
	1 x front panel audio header
	1 x USB 3.2 Gen 1 header
	2 x USB 2.0/1.1 headers
	1 x noise detection header
	1 x Trusted Platform Module (TPM) header (2x6 pin, for the GC-TPM2.0_S
	module only)
	1 x Clear CMOS jumper
	2 x temperature sensor headers

- 8 -

Back Panel		2 x SMA antenna connectors (2T2R)
Connectors		1 x HDMI port
	6 x USB 2.0/1.1 ports
	5 x USB 3.2 Gen 2 Type-A ports (red)
	1 x USB Type-C™ port, with USB 3.2 Gen 2 support
	1 x Q-Flash Plus button
	1 x RJ-45 port
	1 x optical S/PDIF Out connector
	5 x audio jacks
I/O Controller		iTE® I/O Controller Chip
Hardware		Voltage detection
Monitor		Temperature detection
	Fan speed detection
	Water cooling flow rate detection
		Overheating warning
	Fan fail warning
	Fan speed control
			* Whether the fan (pump) speed control function is supported will depend on the fan
			(pump) you install.
		Noise detection
BIOS		2 x 256 Mbit flash
	Use of licensed AMI UEFI BIOS
	Support for DualBIOS™
	PnP 1.0a, DMI 2.7, WfM 2.0, SM BIOS 2.7, ACPI 5.0
Unique Features		Support for APP Center
			* Available applications in APP Center may vary by motherboard model. Supported
			functionsofeachapplicationmayalsovarydependingonmotherboardspecifications.
		-	@BIOS
		-	EasyTune
		-	Fast Boot
		-	Game Boost
		-	ON/OFF Charge
		-	RGB Fusion
		-	Smart Backup
		-	System Information Viewer
	Support for Q-Flash Plus
		Support for Q-Flash
	Support for Xpress Install

- 9 -

	Bundled	Norton® Internet Security (OEM version)
	Software	XSplit Gamecaster + Broadcaster (12 months license)
		Realtek® 8125 Gaming LAN Bandwidth Control Utility
	Operating	Support for Windows 10 64-bit
	System
	Form Factor	ATX Form Factor; 30.5cm x 24.4cm

*GIGABYTE reserves the right to make any changes to the product specifications and product-related information without prior notice.

Please visit GIGABYTE's website for support lists of CPU, memory modules, SSDs, and M.2 devices.

- 10 -

Please visit the Support\Utility List page on GIGABYTE's website to download the latest version of apps.

1-3	Installing the CPU
	Read the following guidelines before you begin to install the CPU:
	••	Make sure that the motherboard supports the CPU.
		(Go to GIGABYTE's website for the latest CPU support list.)
	••	Always turn off the computer and unplug the power cord from the power outlet before installing the
		CPU to prevent hardware damage.
	••	Locate the pin one of the CPU. The CPU cannot be inserted if oriented incorrectly.
	••	Apply an even and thin layer of thermal grease on the surface of the CPU.
	••	Do not turn on the computer if the CPU cooler is not installed, otherwise overheating and damage
		of the CPU may occur.
	••	Set the CPU host frequency in accordance with the CPU specifications. It is not recommended
		that the system bus frequency be set beyond hardware specifications since it does not meet the
		standard requirements for the peripherals. If you wish to set the frequency beyond the standard
		specifications, please do so according to your hardware specifications including the CPU, graphics
		card, memory, hard drive, etc.

Installing the CPU

Locate the pin one (denoted by a small triangle) of the CPU socket and the CPU.

	A Small Triangle		A Small Triangle
	Marking Denotes Pin	AM4 Socket		AM4 CPU
			Marking Denotes CPU
	One of the Socket
			Pin One

1-4 Installing the Memory

Read the following guidelines before you begin to install the memory:

•• Make sure that the motherboard supports the memory. It is recommended that memory of the same capacity, brand, speed, and chips be used.

(Go to GIGABYTE's website for the latest supported memory speeds and memory modules.)

•• Always turn off the computer and unplug the power cord from the power outlet before installing the memory to prevent hardware damage.

•• Memory modules have a foolproof design. A memory module can be installed in only one direction. If you are unable to insert the memory, switch the direction.

Dual Channel Memory Configuration

This motherboard provides four memory sockets and supports Dual Channel Technology. After the memory is installed, the BIOS will automatically detect the specifications and capacity of the memory. Enabling Dual

Channel memory mode will double the original memory bandwidth.

The four memory sockets are divided into two channels and each channel has two memory sockets as following:

Channel A: DDR4_A1, DDR4_A2Channel B: DDR4_B1, DDR4_B2

Please visit GIGABYTE's website for details on hardware installation.

- 11 -

Recommanded Dual Channel Memory Configuration:

	DDR4_A1	DDR4_A2	DDR4_B1	DDR4_B2
2 Modules	- -	DS/SS	- -	DS/SS
4 Modules	DS/SS	DS/SS	DS/SS	DS/SS

(SS=Single-Sided, DS=Double-Sided, "- -"=No Memory)

Due to CPU limitations, read the following guidelines before installing the memory in Dual Channel mode.

1.Dual Channel mode cannot be enabled if only one memory module is installed.

2.When enabling Dual Channel mode with two or four memory modules, it is recommended that memory of the same capacity, brand, speed, and chips be used.

1-5 Installing an Expansion Card

Read the following guidelines before you begin to install an expansion card:

•• Make sure the motherboard supports the expansion card. Carefully read the manual that came with your expansion card.

•• Always turn off the computer and unplug the power cord from the power outlet before installing an expansion card to prevent hardware damage.

1-6 Back Panel Connectors

USB 2.0/1.1 Port

The USB port supports the USB 2.0/1.1 specification. Use this port for USB devices.

SMA Antenna Connectors (2T2R)

Use this connector to connect an antenna.

Tighten the antennas to the antenna connectors and then aim the antennas correctly for better signal reception.

HDMI Port (Note 1)

The HDMI port is HDCP 2.3 compliant and supports Dolby TrueHD and DTS HD

Master Audio formats. It also supports up to 192KHz/24bit 7.1-channel LPCM audio output. You can use this port to connect your HDMI-supported monitor. The maximum supported resolution is 4096x2160@60 Hz, but the actual resolutions supported are dependent on the monitor being used.

After installing the HDMI device, make sure to set the default sound playback device to HDMI. (The item name may differ depending on your operating system.)

•• When removing the cable connected to a back panel connector, first remove the cable from your device and then remove it from the motherboard.

•• When removing the cable, pull it straight out from the connector. Do not rock it side to side to prevent an electrical short inside the cable connector.

- 12 -

USB 3.2 Gen 2 Port

The USB 3.2 Gen 2 port supports the USB 3.2 Gen 2 specification and is compatible to the USB 3.2 Gen 1 and USB 2.0 specification. Use this port for USB devices.

USB 3.2 Gen 2 Port (Q-Flash Plus Port)

The USB 3.2 Gen 2 port supports the USB 3.2 Gen 2 specification and is compatible to the USB 3.2 Gen 1 and USB 2.0 specification. Use this port for USB devices. Before using Q-Flash Plus(Note 2), make sure to insert the USB flash drive into this port first.

Q-Flash Plus Button (Note 2)

Q-Flash Plus allows you to update the BIOS when your system is off (S5 shutdown state). Save the latest

BIOS on a USB thumb drive and plug it into the Q-Flash Plus port, and then you can now flash the BIOS automatically by simply pressing the Q-Flash Plus button. The QFLED will flash when the BIOS matching and flashing activities start and will stop flashing when the main BIOS flashing is complete.

RJ-45 LAN Port

The Gigabit Ethernet LAN port provides Internet connection at up to 2.5 Gbps data rate. The following describes the states of the LAN port LEDs.

Connection/

Activity LED

Connection/Speed LED:

Activity LED:

Speed LED

State

Description

State

Description

Orange

2.5 Gbps data rate

Blinking

Data transmission or receiving is occurring

Green

1 Gbps data rate

Off

No data transmission or receiving is occurring

Off

100 Mbps data rate

LAN Port

USB Type-C™ Port

The reversible USB port supports the USB 3.2 Gen 2 specification and is compatible to the USB 3.2 Gen 1 and USB 2.0 specification. Use this port for USB devices.

Center/Subwoofer Speaker Out

Use this audio jack to connect center/subwoofer speakers.

Rear Speaker Out

Use this audio jack to connect rear speakers.

Optical S/PDIF Out Connector

This connector provides digital audio out to an external audio system that supports digital optical audio. Before using this feature, ensure that your audio system provides an optical digital audio in connector.

Line In/Side Speaker Out

The line in jack. Use this audio jack for line in devices such as an optical drive, walkman, etc.

Line Out/Front Speaker Out

The line out jack. This jack supports audio amplifying function. For better sound quality, it is recommended that you connect your headphone/speaker to this jack (actual effects may vary by the device being used).

Mic In/Side Speaker Out

The Mic in jack.

(Note 1) For new Generation AMD Ryzen™ with Radeon™ Graphics processors only.

(Note 2) To enable the Q-Flash Plus function please visit the "Unique Features" webpage of GIGABYTE's website.

- 13 -

Audio Jack Configurations:

	Jack	Headphone/	4-channel	5.1-channel	7.1-channel
		2-channel
	Center/Subwoofer Speaker			a	a
	Out
	Rear Speaker Out		a	a	a
	Line In/Side Speaker Out				a
	Line Out/Front Speaker Out	a	a	a	a
	Mic In/Side Speaker Out				a

If you want to install a Side Speaker, you need to retask either the Line in or Mic in jack to be Side Speaker out through the audio driver.

Please visit GIGABYTE's website for details on configuring the audio software.

- 14 -

1-7 Internal Connectors

4

1

1

6

3

8

10

11

									2
9									5
									4
									7
13									21
									20
13									12
13
									19
15	8	10	7	17	4	5	16	18	14

1)	ATX_12V1/ATX_12V2	12)	SATA3 0/1/2/3/4/5
2)	ATX	13)	M2A_CPU/M2B_CPU/M2C_CPU
3)	CPU_FAN	14)	F_PANEL
4)	SYS_FAN1/2/3/4	15)	F_AUDIO
5)	SYS_FAN5_PUMP/SYS_FAN6_PUMP	16)	F_U32
6)	CPU_OPT	17)	F_USB1/F_USB2
7)	EC_TEMP1/EC_TEMP2	18)	TPM
8)	D_LED1/D_LED2	19)	CLR_CMOS
9)	LED_CPU	20)	BAT
10)	LED_C1/LED_C2	21)	CPU/DRAM/VGA/BOOT
11)	NOISE_SENSOR

Read the following guidelines before connecting external devices:

•• First make sure your devices are compliant with the connectors you wish to connect.

•• Before installing the devices, be sure to turn off the devices and your computer. Unplug the power cord from the power outlet to prevent damage to the devices.

•• After installing the device and before turning on the computer, make sure the device cable has been securely attached to the connector on the motherboard.

- 15 -

1/2) ATX_12V1/ATX_12V2/ATX (2x2, 2x4, 12V Power Connectors and 2x12 Main Power

Connector)

With the use of the power connector, the power supply can supply enough stable power to all the components on the motherboard. Before connecting the power connector, first make sure the power supply is turned off and all devices are properly installed. The power connector possesses a foolproof design. Connect the power supply cable to the power connector in the correct orientation.

The 12V power connector mainly supplies power to the CPU. If the 12V power connector is not connected, the computer will not start.

To meet expansion requirements, it is recommended that a power supply that can withstand high power consumption be used (500W or greater). If a power supply is used that does not provide the required power, the result can lead to an unstable or unbootable system.

		ATX_12V1:
		Pin No.	Definition
3	4	1	GND
1	2	2	GND
ATX_12V1		3	+12V
		4	+12V
		ATX_12V2:
		Pin No.	Definition	Pin No.	Definition
5	8	1	GND (Only for 2x4-pin 12V)	5	+12V (Only for 2x4-pin 12V)
1	4	2	GND (Only for 2x4-pin 12V)	6	+12V (Only for 2x4-pin 12V)
ATX_12V2		3	GND	7	+12V
		4	GND	8	+12V
		ATX:
12	24	Pin No.	Definition	Pin No.	Definition
		1	3.3V	13	3.3V
		2	3.3V	14	-12V
		3	GND	15	GND
		4	+5V	16	PS_ON (soft On/Off)
		5	GND	17	GND
		6	+5V	18	GND
		7	GND	19	GND
		8	Power Good	20	NC
		9	5VSB (stand by +5V)	21	+5V
		10	+12V	22	+5V
		11	+12V (Only for 2x12-pin	23	+5V (Only for 2x12-pin ATX)
1	13	12	ATX)	24	GND (Only for 2x12-pin ATX)
			3.3V (Only for 2x12-pin ATX)

ATX

- 16 -