The BIOS is split up into Main, OC Tweaker, Advanced, H/W Monitor, Boot and Security submenus split up in the top ASRock uses an American Megatrends AMIBIOS on this board modified for their uses. The Main menu has the BIOS Version, the Processor type, the processor speed, the microcode update, the amount of cache, and the memory information.
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The Advanced screen has CPU, Chipset, ACPI, Storage, PCIPnP, SuperIO, and USB configuration submenus. The CPU submenu is where you disable or enable the various CPU features including the Enhanced Halt State, Virtualization and more. The chipset menu is where you set the amount of graphics memory the internal graphics uses, enable or disable the HD Audio, HDMI and LAN. Storage is where you set the HDDs.
The overclocker will want to use the OC Tweaker menu to get the most out of their new motherboard. The first menu is the Load CPU EZ OC Setting. Here you can set the Turbo 50 setting that will automatically overclock the CPU frequency, the GPU frequency and the voltage to the CPU. This will improve performance by up to 50% in select applications. I was able to overclock the Core i5 661 to 4.2GHz from the EZ OC menu. The Turbo 50 setting was disabled. There’s a wide variety of settings I summarize in this table:
| BCLK | |
| PCIE Frequency | |
| CPU Ratio setting | |
| DRAM Frequency | |
| tCL | 6-11 |
| tRCD | 3-15 |
| tRP | 3-15 |
| TRAS | 9-31 |
| TRFC | 15-255 |
| TWR | 3-15 |
| TWTR | 2-10 |
| TRRD | 4-7 |
| TRTP | 2-13 |
| TFAW | 1-63 |
| DRAM Command rate | 1,2 |
| VDrop | With, without |
| CPU Voltage | Auto, Manual, Overdrive offset |
| DRAM Voltage | 1.30v-2.05v |
| VTT Voltage | 1.11=-1.55v |
| PCH Voltage | 1.05v,1.15v,1.25v |
| CPU PLL Voltage | 1.81v, 1.94v, 2.06v, 2.18v |
| CPU GFX Offset voltage | 0mv-300mv
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BIOS shots

BIOS shots

BIOS shots

BIOS shots

BIOS shots

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BIOS shots

BIOS shots

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