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A75MH / A55MH UEFI BIOS Manual
UEFI BIOS Setup...................................................................................... 1
1 Main Menu ............................................................................................. 3
2 Advanced Menu...................................................................................... 4
3 Chipset Menu ....................................................................................... 17
4 Boot Menu............................................................................................. 25
5 Security Menu ...................................................................................... 27
6 Performance Menu .............................................................................. 28
7 Exit Menu ............................................................................................. 36
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Related Manuals for Biostar A75MH
Summary of Contents for Biostar A75MH
- Page 1 A75MH / A55MH UEFI BIOS Manual UEFI BIOS Setup..................1 1 Main Menu ..................... 3 2 Advanced Menu..................4 3 Chipset Menu ..................17 4 Boot Menu..................... 25 5 Security Menu ..................27 6 Performance Menu ................28 7 Exit Menu ..................... 36...
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Page 2: Uefi Bios Setup
A75MH / A55MH UEFI BIOS Manual UEFI BIOS Setup Introduction The purpose of this manual is to describe the settings in the AMI UEFI BIOS Setup program on this motherboard. The Setup program allows users to modify the basic system configuration and save these settings to NVRAM. -
Page 3: Supported Cpus
A75MH / A55MH UEFI BIOS Manual Supported CPUs This AMI UEFI BIOS supports AMD CPU. Using Setup When starting up the computer, press <Del> during the Power-On Self-Test (POST) to enter the UEFI BIOS setup utility. In the UEFI BIOS setup utility, you will... -
Page 4: Bios Information
A75MH / A55MH UEFI BIOS Manual 1 Main Menu Once you enter AMI UEFI BIOS Setup Utility, the Main Menu will appear on the screen providing an overview of the basic system information. BIOS Information Shows system information including UEFI BIOS version, Project Code, Model Name, Build Date, etc. -
Page 5: Advanced Menu
A75MH / A55MH UEFI BIOS Manual 2 Advanced Menu The Advanced Menu allows you to configure the settings of CPU, Super I/O, Power Management, and other system devices. Notice Beware of that setting inappropriate values in items of this menu may cause system to malfunction. - Page 6 A75MH / A55MH UEFI BIOS Manual PCI ROM Priority In case of multiple option ROMs (Legacy and EFI Compatible), this item specifies what PCI Option ROM to launch Options: Legacy ROM (Default) / EFI Compatible ROM PCI Latency Timer This item sets the value to be programmed into PCI Latency Timer Register.
- Page 7 A75MH / A55MH UEFI BIOS Manual Maximum Payload This item sets Maximum Payload of PCI Express Device or allows System BIOS to select the value. Options: Auto (Default) / 128 Bytes / 256 Bytes / 512 Bytes / 1024 Bytes / 2048...
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Page 8: Ps2 Keyboard Poweron
A75MH / A55MH UEFI BIOS Manual S3 Video Repost This item allows you to enable or disable S3 Video Repost. Options: Disabled (Default) / Enabled EuP Control When EuP is enabled, the system will meet EuP requirement. Options: Disabled (Default) / Enabled PME Wake up from S5 The item enables the system to wake from S5 using PME event. -
Page 9: Ps2 Mouse Poweron
A75MH / A55MH UEFI BIOS Manual Stroke Keys Selected This item will show only when Keyboard PowerOn is set “Stroke Key.” Options: Wake Key (Default) / Power Key / Ctrl+F1 / Ctrl+F2 / Ctrl+F3 / Ctrl +F4 / Ctrl+F5 / Ctrl+F6 Specific Key Enter This item will show only when Keyboard PowerOn is set “Specific Key.”... -
Page 10: Limit Cpuid Maximum
A75MH / A55MH UEFI BIOS Manual Limit CPUID Maximum When the computer is booted up, the operating system executes the CPUID instruction to identify the processor and its capabilities. Before it can do so, it must first query the processor to find out the highest input value CPUID recognizes. This determines the kind of basic information CPUID can provide the operating system. -
Page 11: Sata Configuration
A75MH / A55MH UEFI BIOS Manual CPU Information This item shows CPU Information SATA Configuration The BIOS will automatically detect the presence of SATA devices. There is a sub-menu for each SATA device. Select a device and press <Enter> to enter the... -
Page 12: Smart Fan Control
A75MH / A55MH UEFI BIOS Manual SMART FAN Control CPU Smart FAN This item allows you to control the CPU Smart Fan function. Options: Disabled (Default) / Auto / 4Pin / 3Pin CPU FAN Calibrate Press [ENTER] to calibrate CPU FAN. -
Page 13: Usb Configuration
A75MH / A55MH UEFI BIOS Manual Fan Ctrl Start Value This item sets CPU FAN Start Speed Value. Options: 50 (Default) Fan Ctrl Sensitive The bigger the numeral is, the higher the FAN speed is. Options: 30 (Default) USB Configuration... -
Page 14: Super Io Configuration
A75MH / A55MH UEFI BIOS Manual EHCI Hand-Off This is a workaround for OSes without EHCI hand-off support. The EHCI ownership change should be claimed by EHCI driver. Options: Disabled (Default) / Enabled USB FLASH DRIVE PMAP This items shows when user inserts USB drive. -
Page 15: Serial Port 1 Configuration
A75MH / A55MH UEFI BIOS Manual Serial Port 1 Configuration Serial Port This item enables or disables Serial Port (COM). Options: Enabled (Default) / Disabled Change Settings This item selects an optimal setting for Super IO device. Options: Auto (Default) - Page 16 A75MH / A55MH UEFI BIOS Manual Change Settings This item allows you to select an optimal setting for Super IO device. Options: Auto (Default) / IO=378h; IRQ=5 / IO=378h; IRQ=5, 6, 7, 9, 10, 11, 12 / IO=278h; IRQ=5, 6, 7, 9, 10, 11, 12 / IO=3BCh; IRQ=5, 6, 7, 9, 10, 11, Device Mode This item allows you to determine how the parallel port should function.
- Page 17 A75MH / A55MH UEFI BIOS Manual H/W Monitor Shutdown Temperature This item allows you to set up the CPU shutdown Temperature. Options: Disabled (Default) / 70 /158 / 75 /167 / 80 /176 / 85 /185 ℃ ℉ ℃ ℉...
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Page 18: Chipset Menu
A75MH / A55MH UEFI BIOS Manual 3 Chipset Menu This section describes configuring the PCI bus system. PCI, or Personal Computer Interconnect, is a system which allows I/O devices to operate at speeds nearing the speed of the CPU itself uses when communicating with its own special components. -
Page 19: North Bridge
A75MH / A55MH UEFI BIOS Manual Launch PXE OpROM This item enables/disables Boot Option for Legacy Network Devices. Options: Disabled (Default) / Enabled Launch Storage OpROM This item enables/disables Boot Option for Legacy Mass Storage Devices with Option ROM. Options:... -
Page 20: Integrated Graphics
A75MH / A55MH UEFI BIOS Manual GFX Configuation PSPP Policy This item allows you to set PCIe speed power policy. Options: Balanced-High (Default) / Disabled / Performance / Balanced-Low / Power Saving GFX HD Audio controller This item allows you to enable or disable GFX HD Audio controller. -
Page 21: South Bridge Configuration
A75MH / A55MH UEFI BIOS Manual Bank Interleaving Bank Interleaving is an advanced chipset technique used to improve memory performance. Memory interleaving increases bandwidth by allowing simultaneous access to more than one piece of memory. Options: Enabled (Default) / Disabled Channel Interleaving This item allows you to control the DDR3 dual-channel function. - Page 22 A75MH / A55MH UEFI BIOS Manual SB SAT A Configuration OnChip SATA Channel This option allows you to enable the on-chip Serial ATA. Options: Enabled (Default) / Disabled OnChip SATA Type This option allows you to select the on-chip Serial ATA operation mode.
- Page 23 A75MH / A55MH UEFI BIOS Manual SB USB Configuration XHCI Switch (Only for A75MH) This item allows you to switch XHCI Options: Enabled (Default) / Disabled OHCI HC (Bus 0 Dev 18/19/20 Fn 0/5) This item allows you to control OHCI host controller. (USB 1.1 Device)
- Page 24 A75MH / A55MH UEFI BIOS Manual SB GPP Port Configuration GPP Link ASPM Options: Disabled (Default) / L0s / L1 / L0s+L1 GPP Gen2/ UMI Gen2 Options: Enabled (Default) / Disabled GPP HW Compliance Mode Options: Disabled (Default) / Port A / Port B / Port C / Port D...
- Page 25 A75MH / A55MH UEFI BIOS Manual HD Audio Azalia Device This item allows you to control the HD audio device. Options: Enabled (Default) / Auto / Disabled...
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Page 26: Setup Prompt Timeout
A75MH / A55MH UEFI BIOS Manual 4 Boot Menu This menu allows you to setup the system boot options. Setup Prompt Timeout This item sets number of seconds to wait for setup activation key. Options: 2 (Default) Bootup NumLock State This item selects the keyboard NumLock state. -
Page 27: Gatea20 Active
A75MH / A55MH UEFI BIOS Manual GateA20 Active Upon Request – FA20 can be disabled using BIOS services. Always – do not allow disabling GA20; this option is useful when any RT code is executed above 1MB Options: Upon Request (Default) / Always Option ROM Messages This item sets the display mode for option ROM. -
Page 28: Security Menu
A75MH / A55MH UEFI BIOS Manual 5 Security Menu Administrator Password This item sets Administrator Password. User Password This item sets User Password. -
Page 29: Performance Menu
A75MH / A55MH UEFI BIOS Manual 6 Performance Menu This submenu allows you to change voltage and clock of various devices. (However, we suggest you use the default setting. Changing the voltage and clock improperly may damage the device.) Notice Beware of that setting inappropriate values in items of this menu may cause system to malfunction. - Page 30 A75MH / A55MH UEFI BIOS Manual P-States Configuration Custom P-States This item tells BIOS whether to use the setup option below this to configure the P-States, or whether to configure the P-States automatically. Options: Disabled (Default) / Enabled Core FID This item sets the frequency to use for Core P-State selected.
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Page 31: Over-Voltage Configuration
A75MH / A55MH UEFI BIOS Manual Over-Voltage Configuration APU-Core Over Voltage This item allows you to select APU-Core Voltage Control. APU-NB Over Voltage This item allows you to select APU-NB Voltage Control. DDR Memory Over Voltage This item allows you to select DDR Memory Voltage Control. -
Page 32: Dram Timing Configuration
A75MH / A55MH UEFI BIOS Manual DRAM Timing Configuration MCT Timing Mode This item allows you to select the DRAM Frequency programming method. If Auto, the DRAM speed will be based on SPDs. If Limit, the DRAM speed will not exceed the specified value. - Page 33 A75MH / A55MH UEFI BIOS Manual TRCD Options: Auto (Default) / 5~12 CLK Options: Auto (Default) / 5~12 CLK TRTP Options: Auto (Default) / 4~7 CLK TRAS Options: Auto (Default) / 15~30 CLK Options: Auto (Default) / 11~42 CLK Options:...
- Page 34 A75MH / A55MH UEFI BIOS Manual TRDRD Options: Auto (Default) / 4~7 CLK TRFC0 / TRFC1 Options: Auto (Default) / 90ns / 110ns / 160ns / 300ns / 350ns MCT Configuration Bank Interleaving Bank Interleaving is an advanced chipset technique used to improve memory performance.
- Page 35 A75MH / A55MH UEFI BIOS Manual MemClk Tristate C3/ATLVID This item enables or disables the MemClk Tristate function in C3 Mode. Options: Disable Link (Default) / Enabled Memory Hole Remapping This item allows you to enable or disable the remapping of the overlapped PCI memory above the total physical memory.
- Page 36 A75MH / A55MH UEFI BIOS Manual DDR3_A1/B1 These items display SPD information of DDR3 memory.
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Page 37: Save Changes And Reset
A75MH / A55MH UEFI BIOS Manual 7 Exit Menu This menu allows you to load the optimal default settings, and save or discard the changes to the BIOS items. Save Changes and Reset Reset the system after saving the changes.