Dell EMC PowerEdge R940xa BIOS and UEFI Reference Guide
Summary
BIOS and UEFI reference guide for Dell EMC PowerEdge R940xa 4-socket server. Documents System Setup, iDRAC Settings, Device Settings, and Lifecycle Controller. Covers boot options, virtualization settings (VT-d, VT-x), processor and memory configuration, PCI management, power settings, UEFI boot mode, secure boot, and PXE boot. Targets data center administrators configuring PowerEdge R940xa servers.
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Dell EMC Power Edge R940xa BIOS and UEFI Reference Guide
Part Number: E54S Series Regulatory Type: E54S001 June 2021 Rev. A01
Page Summary Contents For Dell EMC PowerEdge R940xa BIOS and UEFI Reference Guide
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Dell EMC Power Edge R940xa BIOS and UEFI Reference Guide Part Number: E54S Series Regulatory Type: E54S001 June 2021 Rev. A01
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Notes, cautions, and warnings NOTE: A NOTE indicates important information that helps you make better use of your product. CAUTION: A CAUTION indicates either potential damage to hardware or loss of d...
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Contents Chapter 1: Pre-operating system management applications...........................................................4 Options to manage the pre-operating system applications.......................
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Pre-operating system management applications You can manage basic settings and features of a system without booting to the operating system by using the system firmware. Topics: Options to manage the ...
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System Setup details The System Setup Main Menu screen details are explained as follows: Option Description System BIOS Enables you to configure BIOS settings. i DRAC Settings Enables you to configure...
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Option Description NVMe Settings Specifies options to change the NVMe settings. If the system contains the NVMe drives that you want to configure in a RAID array, you must set both this field and the ...
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Option Description System BIOS Specifies the BIOS version installed on the system. Version System Specifies the current version of the Management Engine firmware. Management Engine Version System Serv...
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Option Description System Memory Specifies the system memory voltage. Voltage Video Memory Specifies the amount of video memory. System Memory Specifies whether the system memory tests are run during ...
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Processor Settings You can use the Processor Settings screen to view the processor settings, and perform specific functions such as enabling virtualization technology, hardware prefetcher, logical pro...
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Option Description DCU Streamer Enables or disables the Data Cache Unit (DCU) streamer prefetcher. This option is set to Enabled by Prefetcher default. DCU IP Enables or disables the Data Cache Unit (...
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Option Description Option Description Family-Model- Specifies the family, model, and stepping of the processor as defined by Intel. Stepping Brand Specifies the brand name. Level 2 Cache Specifies the...
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Option Description Option Description Model Specifies the drive model of the selected device. NOTE: If no device is installed, it displays Unkown. Drive Type Specifies the type of drive attached to th...
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Support for drive partitions larger than 2 TB. Enhanced security (e.g., UEFI Secure Boot). Faster boot time. NOTE: You must use only the UEFI boot mode in order to boot from NVMe drives. View Boot Set...
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Network Settings You can use the Network Settings screen to modify UEFI PXE, i SCSI, and HTTP boot settings. The network settings option is available only in the UEFI mode. NOTE: The BIOS does not con...
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Option Description Table 1. UEFI i SCSI Settings screen details (continued) Option Description i SCSI Device1 Settings Enables you to control the configuration of the i SCSI device. TLS View and/or mo...
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Option Description NOTE: If set to Disabled (OS), the Integrated NICs might still be available for shared network access by i DRAC. I/OAT DMA Enables or disables the I/O Acceleration Technology (I/OAT...
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Table 2. Slot Disablement (continued) Slot Description number Slot 3 Enables or disables or only the boot driver is disabled for the PCIe slot 3. This option is set to Enabled by default. Slot 4 Enabl...
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Table 3. Slot Bifurcation (continued) Option x16 PCIe riser 1 and 2 configuration x8 PCIe riser 1 and 2 configuration Slot 6 Bifurcation x4 or x8 or x16, or x4, x4, x8, or x8, x4,x4 x4 or x8 or x16, o...
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Option Description NOTE: You can use only Serial Device 2 for the Serial Over LAN (SOL) feature. To use console redirection by SOL, configure the same port address for console redirection and the seri...
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Option Description NOTE: All the parameters on the system profile setting screen are available only when the System Profile option is set to Custom. CPU Power Sets the CPU power management. This optio...
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Performance Latency Optimized offers better RDIMM/LRDIMM latency in the presence of DCPMM. Balanced Setting Profile optimizes performance with Memory Mode-configured DCPMM. System Security You can use...
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Option Description Table 4. TPM 1.2 security information (continued) TPM information Description TPM Command Controls the Trusted Platform Module (TPM). When set to None, no command is sent to the TPM...
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Option Description User Defined Sets the User Defined Delay option when the User Defined option for AC Power Recovery Delay is Delay (60 s to selected. 600 s) UEFI Variable Provides varying degrees of...
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Redundant OS Control You can use the Redundant OS Control screen to set the redundant OS info for redundant OS control. It enables you to set up a physical recovery disk on your system. Viewing Redund...
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Miscellaneous Settings You can use the Miscellaneous Settings screen to perform specific functions such as updating the asset tag and changing the system date and time. View Miscellaneous Settings To ...
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For more information about using i DRAC, see Dell Integrated Dell Remote Access Controller User's Guide at www.dell.com/ idracmanuals. Device Settings Device Settings enables you to configure the devi...
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Menu item Description Launch Lifecycle Exits the Boot Manager and invokes the Dell Lifecycle Controller program. Controller System Utilities Enables you to launch System Utilities menu such as System ...
Manual Details
| Brand | Dell |
|---|---|
| Pages | 27 |
| File Size | 199.96 KB |
| Published | June 24, 2026 |
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Frequently Asked Questions
How do I access System Setup?
Press F2 immediately after turning on the system.
How do I access the Boot Manager?
Press F11 during POST to select boot options or utilities.
How do I boot using PXE?
Press F12 during POST to access the PXE boot option.
What utilities are available in System Utilities?
Launch Diagnostics, BIOS Update File Explorer, and Reboot System.