Dell Server PowerEdge R750, R750xa, R750xs, R650, R650xs, R550, R450, C6520, MX750c and T550 BIOS Version 1.9.2

- The SGX sealed data became inaccessible after BIOS 1.9.2 that the enclave may not allow access by older BIOS according to a security improvement. Hence, it is not recommended to downgrade the BIOS to older version in an Intel SGX-enabled system. And Intel Software Guard Extensions Data Center Attestation Primitives (Intel SGX DCAP) and Intel Software Guard Extensions Provisioning Certification Service (Intel SGX PCS) users need to update BIOS to 1.9.2 and newer version when verification collateral with Intel IAS-LIV enforcement server after January 17, 2023.
- The 5-level paging is enabled by disabling the CPU Physical Address Limit option from BIOS setup menu. The CPU Physical Address Limit option causes the operating system to stop at the driver verifier DMA violation test with a blue screen error while booting from an operating system that does not support 5-level paging such as, Microsoft Windows Server 2019, Microsoft Windows Server 2016 etc.
- While updating the BIOS from version 1.4.4 or from versions earlier than version 1.5.4 to a later version for the first time, the Correctable Error Logging (CEL) option is set to Disabled by default.

Dell Update Package Instructions for DRMK
Download
1. Click the "Download" link to download the file.
2. If the Export Compliance Disclaimer window appears, click the "I agree" link if you accept the agreement.
3. When the File Download window appears, click "Save" to save the file to your hard drive.

Installation
NOTE: You must provide a DOS bootable media, such as a USB key. This executable file does not create the DOS system files.
1. Browse to the location where you downloaded the file.
2. Update the name of the file to DOS recognizable format (8.3). If you do not update the filename to 8.3 format, the filename will be truncated to 8.3 format.
3. Copy the file to the bootable device.
4. Boot the system to DOS by using the bootable device.
5. Run the executable under DOS. Follow the instructions provided by the flash utility.
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Dell Update Package Instructions for EFI
Download
1. Click the "Download" link to download the file.
2. If the Export Compliance Disclaimer window appears, click the "I agree" link if you accept the agreement.
3. When the File Download window appears, click "Save" to save the file to your hard drive.
Installation
You can update the BIOS using a UEFI shell bootable media, such as a USB key.
1. Copy the file to the bootable device with UEFI shell.
2. Boot the system to UEFI shell by using the bootable device.
3. Run the executable (.efi) under the UEFI shell. Follow the instructions provided by the flash utility.

You can also load this executable directly from BIOS Boot Manager without a UEFI shell bootable media.
1. Copy the file to a USB device
2. Plug in the USB device and press F11 during POST to enter BIOS Boot Manager
3. Navigate to the System Utilities menu and select BIOS Update File Explorer
4. Select the USB device and navigate through the directory contents to find the executable (.efi)
5. Launch the executable and follow the instructions provided by the flash utility.
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Dell Update Package Instructions for Linux DUP:
Download
1. Click the "Download" link to download the file.
2. When the File Download window appears, click "Save" to save the file to your hard drive.
Installation
1. Read over the release information presented by executing the "./[model]_BIOS_LX_[revision].BIN --version" command from the shell.
2. Download and install any prerequisites identified in the above step before proceeding.
3. Install any necessary Embedded Systems Management firmware prior to this BIOS update.
4. Run the update by executing "./[model]_BIOS_LX_[version].BIN" from the shell.
5. Follow the remaining prompts to perform the update.
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Dell Update Package Instructions for Windows Dup:
Download
1. Click the "Download" link to download the file.
2. When the File Download window appears, click "Save" to save the file to your hard drive.
Installation
1. Browse to the location where you downloaded the file and double-click the new file.
2. Read over the release information presented in the dialog window.
3. Download and install any prerequisites identified in the dialog window before proceeding.
4. Install any necessary Embedded Systems Management firmware prior to this BIOS update.
5. Click the Install button.
6. Follow the remaining prompts to perform the update.
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GnuPG Signature of Dell Update Package Instructions:
Download
1. Click the "Download" link to download the file.
2. When the "File Download" window appears, click "Save" to save the file to your hard drive.
Installation
1. Import the Dell public key. (You only need to do once on your system.)
2.Verify the Dell Update Package by using its signature file, [model]_BIOS_LX_[version].BIN.sign