Asus CROSSHAIR IV EXTREME, User Manual, Page: 4 / 172

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Contents
2.7 I/O shield Installation ................................................................. 2-27
2.8 Connectors ................................................................................. 2-28
2.8.1 Rear panel connectors .................................................. 2-28
2.8.2 Audio I/O connections ................................................... 2-29
2.8.3 Internal connectors ....................................................... 2-32
2.8.4 ASUS Q-Connector (system panel) .............................. 2-40
2.8.5 Onboard switches ......................................................... 2-41
2.8.6 ProbeIt .......................................................................... 2-45
2.9 Starting up for the first time ...................................................... 2-46
2.10 Turning off the computer ........................................................... 2-47
2.10.1 Using the OS shut down function .................................. 2-47
2.10.2 Using the dual function power switch ............................ 2-47
Chapter 3: BIOS setup
3.1 Managing and updating your BIOS ............................................ 3-1
3.1.1 ASUS Update utility ........................................................ 3-1
3.1.2 ASUS EZ Flash 2 utility ................................................... 3-4
3.1.3 ASUS CrashFree BIOS 3 utility ...................................... 3-5
3.2 BIOS setup program .................................................................... 3-6
3.2.1 BIOS menu screen .......................................................... 3-7
3.2.2 Menu bar ......................................................................... 3-7
3.2.3 Navigation keys ............................................................... 3-7
3.2.4 Menu items ..................................................................... 3-8
3.2.5 Submenu items ............................................................... 3-8
3.2.6 Configuration fields ......................................................... 3-8
3.2.7 Pop-up window ............................................................... 3-8
3.2.8 Scroll bar ......................................................................... 3-8
3.2.9 General help ................................................................... 3-8
3.3 Extreme Tweaker menu ............................................................... 3-9
3.3.1 CPU Level Up ................................................................ 3-9
3.3.2 OC Tuner Utility ............................................................. 3-10
3.3.3 Ai Overclock Tuner ....................................................... 3-10
3.3.4 CPU Ratio .....................................................................3-11
3.3.5 DRAM Frequency .........................................................3-11
3.3.6 CPU/NB Frequency ......................................................3-11