ADLINK DLAP-4000 Deployment and BIOS Optimization

COM Mode Select (COM1 only): Supports RS-232, RS-485 half duplex, and RS-422 full duplex. After selection, it needs to be restarted to take effect.

WatchDog: Can set timeout values (in seconds or minutes) for automatic reset of system exceptions. It is recommended to set it to 60-120 seconds in the production environment.

3.2.3 Hardware Monitoring and Intelligent Fans

NCT6106D HW Monitor: Real time viewing of CPU temperature, system temperature, fan speed, and various voltage values.

Smart Fan: Supports "SMART FAN IV mode" and "Manual mode".

In IV mode, the temperature PWM curve can be set (4 temperature points correspond to 4 PWM values). For example, temperature 25 ℃ → PWM 80, 40 ℃ → 130, 55 ℃ → 190, 62 ℃ → 255 (full speed). The default value has been optimized, but if a high-power graphics card is installed in the chassis, it is recommended to increase the fan response (such as lowering the temperature point).

Manual mode directly fixes the PWM output (0~255) for constant speed scenarios.

3.2.4 S5 RTC wake-up

After activation, it can automatically turn on at the set date and time (with hardware support), suitable for unmanned scheduled tasks.

3.2.5 USB Configuration

XHCI Compliance Mode: Disabled by default. Only enable when USB consistency testing is required, otherwise keep disabled to enhance compatibility.

USB Standby Power: Control whether each USB port is powered during standby mode. If connecting a keyboard and mouse for wake-up, the corresponding port needs to be enabled.

3.2.6 CSM Configuration (Compatibility Support Module)

When installing traditional Legacy operating systems (such as Windows 7 32-bit), CSM Support needs to be enabled and each Option ROM needs to be set to "Legacy" mode.

If only using UEFI system (Win10/11), CSM can be turned off to speed up startup.

3.2.7 Network Stack Configuration

Network Stack must be enabled before using PCIe network boot.

IPv4/IPv6 PCIe support can be enabled separately, and wait timeout (in seconds) and media detection times can be set.

Chipset Key Settings

4.1 System Agent

Memory Configuration: Can view DIMM information and frequency. Max TOLUD (Top of Low Usable DRAM) recommends maintaining "Dynamic" and the system automatically adjusts the space left for MMIO. If installing a high-capacity graphics card, manually increasing it (such as 3GB) can avoid memory address conflicts.

Graphics Configuration：

Primary Display: When selecting "Auto", prioritize using PEG (if inserted) or IGFX (integrated display). If you need to force integrated display output, select "IGFX".

DVMT Pre Allocated: Fixed memory allocated to integrated displays, recommended to be 64MB or above to ensure high-resolution display without flicker.

LVDS Control: Although DLAP-4000 does not have onboard LVDS, this option is reserved for customized model reference.

4.2 PCH-IO Configuration

PCI Express Root Port: Each PCIe port (Mini PCIe, LAN1, LAN2) can be individually enabled/disabled. Disabling unused ports can reduce resource consumption.

SATA Configuration: Ensure that the SATA controller is enabled and select AHCI mode (RST mode is used for RAID, but this platform only has 2 SATA ports, AHCI is sufficient).

HD Audio: enabled by default, can be turned off to reduce interruptions if no audio is needed.

Restore AC Power Loss: Set the behavior after power failure recovery. Recommend "Last State" or "Power On" to avoid manually pressing the power button on site.

GPIO Group Control: Here, the direction (input/output) and default level (high/low) of 8 GPIO pins can be configured separately. Attention: GPIO direction priority is higher than the operating system driver. If GPIO cannot be controlled after system startup, please check the settings here first.

Security and Startup

Secure Boot: If you need to install non Microsoft signed drivers or Linux, you need to disable Secure Boot or set it to "Custom" mode and manually import the key.

Boot Mode: Optional LEGACY or UEFI, automatically adjusts CSM parameters. Most new systems choose UEFI.

Boot Option Priority: The order can be set (hard drive, optical drive, USB, network, etc.). Suggest setting the system disk as the first priority.

Thermal management and environmental adaptability

The nominal operating temperature of DLAP-4000 is 0 ℃~50 ℃ (depending on configuration). In practical engineering, if installing high-power CPUs (65W i7-9700E) and high-end graphics cards (such as RTX 5000, with a power consumption of 160W), it is necessary to pay attention to heat dissipation:

Active cooling: There are two fans inside the chassis (CPU fan and system fan). The speed can be monitored in the BIOS. If the CPU temperature exceeds 80 ℃ (PECI reading), the fan should be checked for blockage or dust accumulation on the heat sink.

Intelligent Fan Curve Optimization: For high load scenarios, it is recommended to set the four temperature points of the CPU Smart Fan to 40 ℃/55 ℃/70 ℃/85 ℃, corresponding to PWM values of 100/150/200/255, and intervene in cooling in advance.

Chassis installation: Ensure that the left, right, and rear ventilation openings are unobstructed, and the front and rear air flow is smooth. If installed in a closed cabinet, a cabinet exhaust fan needs to be installed.