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Asus M4A78 PRO User Manual - Page 34

Internal connectors

UPC - 610839169078

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1.10.2 Internal connectors 1. CPU, Chassis and Power Fan connectors (4-pin CPU_FAN, 3-pin CHA_FAN1, 3-pin PWR_FAN) The fan connectors support cooling fans of 350mA~740mA (8.88W max.) or a total of 1A~2.22A (26.64W max.) at +12V. Connect the fan cables to the fan connectors on the motherboard, making sure that the black wire of each cable matches the ground pin of the connector. Do not forget to connect the fan cables to the fan connectors. Insufficient air flow inside the system may damage the motherboard components. These are not jumpers! DO NOT place jumper caps on the fan connectors. Only the CPU_FAN and CHA_FAN1 connectors support the ASUS Q FAN 2 feature. 2. Chassis intrusion connector (4-1 pin CHASSIS) This connector is for a chassis-mounted intrusion detection sensor or switch. Connect one end of the chassis intrusion sensor or switch cable to this connector. The chassis intrusion sensor or switch sends a high-level signal to this connector when a chassis component is removed or replaced. The signal is then generated as a chassis intrusion event. By default, the pins labeled "Chassis Signal" and "Ground" are shorted with a jumper cap. Remove the jumper caps only when you intend to use the chassis intrusion detection feature. 1-22 ASUS M4A78 PRO

Section	Page
Contents	3
Notices	6
Safety information	7
About this guide	7
M4A78 PRO specifications summary	9
Chapter 1 Product introduction	13
1.1 Welcome!	13
1.2 Package contents	13
1.3 Special features	13
1.3.1 Product highlights	13
1.3.2 Innovative ASUS features	14
1.4 Before you proceed	16
1.5 Motherboard overview	17
1.5.1 Placement direction	17
1.5.2 Screw holes	17
1.5.3 Motherboard layout	18
1.5.4 Layout contents	18
1.6 Central Processing Unit (CPU)	19
1.6.1 Installing the CPU	19
1.6.2 Installing the heatsink and fan	20
1.7 System memory	22
1.7.1 Overview	22
1.7.2 Memory configurations	22
1.7.3 Installing a DIMM	27
1.7.4 Removing a DIMM	27
1.8 Expansion slots	28
1.8.1 Installing an expansion card	28
1.8.2 Configuring an expansion card	28
1.8.3 PCI slots	28
1.8.4 PCI Express x1 slots	28
1.8.5 PCI Express x16 slot	28
1.9 Jumpers	29
1.10 Connectors	31
1.10.1 Rear panel connectors	31
1.10.2 Internal connectors	34
1.11 Software support	43
1.11.1 Installing an operating system	43
1.11.2 Support DVD information	43
Chapter 2 BIOS information	45
2.1 Managing and updating your BIOS	45
2.1.1 Creating a bootable floppy disk	45
2.1.2 ASUS Update utility	46
2.1.3 ASUS EZ Flash 2 utility	47
2.1.4 AFUDOS utility	48
2.1.5 ASUS CrashFree BIOS 3 utility	49
2.2 BIOS setup program	50
2.2.1 BIOS menu screen	51
2.2.2 Menu bar	51
2.2.3 Navigation keys	52
2.2.4 Menu items	52
2.2.5 Submenu items	52
2.2.6 Configuration fields	52
2.2.7 General help	52
2.2.8 Pop-up window	52
2.2.9 Scroll bar	52
2.3 Main menu	53
2.3.1 System Time [xx:xx:xx]	53
2.3.2 System Date [Day xx/xx/xxxx]	53
2.3.3 Legacy Diskette A [1.44M, 3.5 in.]	53
2.3.4 Primary IDE Master/Slave	53
2.3.5 SATA 1–6	54
2.3.6 Storage Configuration	55
2.3.7 System Information	55
2.4 Ai Tweaker menu	56
2.4.1 AI Overclocking [Auto]	56
2.4.2 DRAM Frequency Control [Auto]	56
2.4.3 HT Link Speed [Auto]	57
2.4.4 Processor Voltage [Auto]	59
2.4.5 CPU/NB Voltage [Auto]	59
2.4.6 CPU VDDA Voltage [Auto]	60
2.4.7 DRAM Voltage [Auto]	60
2.4.8 HT Voltage [Auto]	60
2.4.9 NB Voltage [Auto]	60
2.4.10 NB 1.8V Voltage [Auto]	60
2.4.11 SB Voltage [Auto]	60
2.4.12 CPU Spread Spectrum [Enabled]	60
2.4.13 PCIE Spread Spectrum [Enabled]	60
2.4.14 SB Clock Spread Spectrum [Disabled]	60
2.5 Advanced menu	61
2.5.1 CPU Configuration	61
2.5.2 Chipset	62
2.5.3 Onboard Devices Configuration	64
2.5.4 USB Configuration	65
2.6 Power menu	65
2.6.1 Suspend Mode [Auto]	66
2.6.2 Repost Video on S3 Resume [No]	66
2.6.3 ACPI 2.0 Support [Disabled]	66
2.6.4 ACPI APIC Support [Enabled]	66
2.6.5 APM Configuration	66
2.6.6 Hardware Monitor	67
2.7 Boot menu	68
2.7.1 Boot Device Priority	68
2.7.2 Boot Settings Configuration	68
2.7.3 Security	69
2.8 Tools menu	70
2.8.1 ASUS EZ Flash 2	70
2.8.2 Express Gate [Enabled]	70
2.8.3 ASUS O.C. Profile	71
2.8.4 AI NET 2	71

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1.10.2

Internal connectors

CPU, Chassis and Power Fan connectors (4-pin CPU_FAN, 3-pin CHA_FAN1,

3-pin PWR_FAN)

The fan connectors support cooling fans of 350mA~740mA (8.88W max.) or a total of

1A~2.22A (26.64W max.) at +12V. Connect the fan cables to the fan connectors on the

motherboard, making sure that the black wire of each cable matches the ground pin of

the connector.

Do not forget to connect the fan cables to the fan connectors. Insufﬁcient air ﬂow inside the

system may damage the motherboard components. These are not jumpers! DO NOT place

jumper caps on the fan connectors.

Only the CPU_FAN and CHA_FAN1 connectors support the ASUS Q FAN 2 feature.

Chassis intrusion connector (4-1 pin CHASSIS)

This connector is for a chassis-mounted intrusion detection sensor or switch. Connect

one end of the chassis intrusion sensor or switch cable to this connector. The chassis

intrusion sensor or switch sends a high-level signal to this connector when a chassis

component is removed or replaced. The signal is then generated as a chassis intrusion

event.

By default, the pins labeled “Chassis Signal” and “Ground” are shorted with a jumper

cap. Remove the jumper caps only when you intend to use the chassis intrusion

detection feature.

1-22

ASUS M4A78 PRO