Dell Dual 10G NIC Not Detected by Windows Server 2025 Despite Being Visible in iDRAC
A Dell server's dual 10G NIC is visible and healthy in iDRAC hardware inventory but fails to appear as a network adapter in Windows Server 2025 Standard, leaving the server without 10G connectivity. The root cause is typically missing or incompatible NIC drivers, as Windows Server 2025 may not include inbox support for the specific Dell NIC chipset. Resolution involves identifying the NIC via hardware IDs, obtaining the correct driver from Dell Support using the server's Service Tag, and installing it manually or via compatibility fallback from a Windows Server 2022 driver package.
Indicators
- Dual 10G NIC visible in iDRAC System > Hardware > Network Devices but absent from Windows Device Manager
- No 10G network adapters listed under 'Network adapters' in Device Manager after Windows Server 2025 installation
- NIC appears as an unknown device with a warning icon under 'Other devices' in Device Manager
- Get-NetAdapter in PowerShell returns no entry for the 10G NIC
- No network connectivity available on 10G ports despite confirmed physical seating
- PnP or driver-related errors in Event Viewer System or Hardware logs referencing the NIC's PCI hardware ID
- iDRAC Lifecycle Controller confirms card is seated and hardware status is healthy
Likely causes
- Windows Server 2025 does not include inbox drivers for the specific Dell 10G NIC chipset
- Dell driver pack not yet updated to fully support Windows Server 2025 at time of deployment
- OS installed without injecting OEM NIC drivers via Windows PE or Deployment Toolkit
- Incorrect or outdated driver version installed that does not match the NIC model or OS version
- Secure Boot or driver signature enforcement blocking an unsigned or incompatible driver package
- NIC firmware level incompatible with Windows Server 2025 driver requirements
Diagnostic steps
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Open the iDRAC web interface, navigate to System > Hardware > Network Devices, and confirm the dual 10G NIC is listed with a healthy status to rule out hardware failure or seating issues.
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On Windows Server 2025, open Device Manager (devmgmt.msc) and inspect 'Network adapters' and 'Other devices' for missing adapters, unknown devices, or entries with yellow warning icons.
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Run 'Get-NetAdapter' in an elevated PowerShell session to enumerate all OS-recognised network adapters and confirm whether the 10G NIC is visible at the OS level.
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In Device Manager, right-click any unknown device, select Properties > Details > Hardware IDs, and record the VEN/DEV/SUBSYS values to identify the exact NIC chipset.
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Open Event Viewer (eventvwr.msc) and review System and Microsoft-Windows-Kernel-PnP logs for errors or warnings referencing the NIC's PCI hardware ID or driver load failures.
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Navigate to Dell Support (support.dell.com), enter the server's Service Tag, and search under Drivers & Downloads > Network for Windows Server 2025-compatible NIC driver packages.
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Download the latest compatible NIC driver. If no Windows Server 2025 driver is listed, download the Windows Server 2022 driver as a compatibility fallback.
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Install the driver by running the Dell driver executable or by using Device Manager > Update Driver > Browse my computer. Alternatively, use 'pnputil.exe /add-driver <inf_path> /install' for manual INF injection.
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After installation, run 'Get-NetAdapter' again to confirm the 10G NIC is now recognised, assign IP configuration, and verify connectivity using 'Test-NetConnection -ComputerName <target> -Port 80'.
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If the driver installs but fails to load, check whether Secure Boot is blocking the driver signature. If so, either disable Secure Boot temporarily or obtain a WHQL-signed driver from Dell.
Resolution path
- Confirm NIC is physically present and hardware-healthy via iDRAC System > Hardware > Network Devices
- Open Device Manager on Windows Server 2025 and identify the NIC as an unknown device or confirm it is absent
- Capture hardware IDs (VEN/DEV/SUBSYS) from Device Manager to identify the exact NIC chipset
- Use the server Service Tag on Dell Support (support.dell.com) to locate Windows Server 2025-compatible NIC drivers under Drivers & Downloads > Network
- Download and install the appropriate driver package; use the Windows Server 2022 driver as a compatibility fallback if no WS2025 driver is yet published
- Inject the driver using pnputil.exe if the executable installer does not trigger automatically
- If Secure Boot is blocking the driver, verify driver signing or temporarily disable Secure Boot to test
- Run Get-NetAdapter to confirm the NIC is now recognised by the OS
- Assign IP configuration and validate 10G network connectivity using Test-NetConnection
Prevention
- Before deploying a new OS version, audit driver availability for all installed hardware components on Dell's support portal against the target OS
- Use Dell OpenManage Deployment Toolkit (DTK) or Windows PE driver injection to pre-load NIC drivers during OS installation
- Maintain a curated local driver repository for all server hardware models prior to initiating OS upgrades or fresh deployments
- Test new OS versions (including Windows Server 2025) on representative hardware in a staging environment to surface driver gaps before production rollout
- Subscribe to Dell driver and firmware update notifications for the specific server model to receive timely alerts when new OS support is added
- Keep NIC firmware current via iDRAC Lifecycle Controller before upgrading the OS to ensure firmware-level compatibility with new driver packages
- Document the hardware IDs of all critical NICs in the server build record to accelerate driver identification during future OS migrations
Tools
- iDRAC Web Interface
- Windows Device Manager (devmgmt.msc)
- PowerShell – Get-NetAdapter
- PowerShell – Test-NetConnection
- Windows Event Viewer (eventvwr.msc)
- PnPUtil (pnputil.exe) – manual driver injection
- Dell Support Portal (support.dell.com)
- Dell OpenManage Server Administrator (OMSA)
- Dell OpenManage Deployment Toolkit (DTK) – driver injection during OS install