Intel x520 on Windows Server 2019 vs 2025

Testing indicates that Windows Server 2019 provides more stable and consistent operation with Intel X520 network adapters than Windows Server 2025 in this environment. Observed differences include improved driver compatibility and fewer networking issues under Windows Server 2019. As hardware, firmware, and driver versions may affect results, behavior can vary between deployments.

1. CrystalDiskMark client PC test results (1G environment) with Windows Server 2019 (Figure 1).

Figure 1

2. CrystalDiskMark client PC test results (1G environment) with Windows Server 2025 (Figure 2).

Figure 2

3. Windows Server 2019 has demonstrated better compatibility and operational stability with Intel X520 network adapters than Windows Server 2025 in our testing environment.