: WinCC 7.5 SP2 is strictly tied to SQL Server 2016 SP2 (64-bit). Attempts to manually upgrade to SQL Server 2022 are not supported and will cause connection failures.
The best performance for a WinCC V7.5 SP2 system is achieved by meeting or exceeding the recommended specifications rather than the minimums. Requirement Recommended (Best Practice) Dual-core 2.5 GHz Multi-core 2.7 GHz+ (3.5 GHz for Servers) 4 GB (Client/Single-user) 8 GB - 16 GB (32 GB for large projects) 1.5 GB - 10 GB (free space) SSD with 50 GB+ available 800 x 600 resolution 1920 x 1080 (Full HD) Siemens WinCC V7.5 SP2 Installation Notes 3. Software and Virtualization Compatibility wincc 75 sp2 compatibility list best
Supported starting from specific updates of WinCC V7.5 SP2. However, deployment is tightly bound to earlier builds (such as 22H2 / 23H2 ). Newer rolling releases like Windows 11 25H2 are explicitly incompatible , frequently resulting in severe breakdown of the Automation License Manager (ALM) or Graphic Designer crashes. Validated Server Operating Systems WinCC V7.5 SP2 Architectures - Siemens : WinCC 7
Officially supported starting with SP2. It is critical to use the WinCC V7.5 SP2 installation medium directly to avoid SQL Server compatibility issues often found in earlier versions. Windows Server: Requirement Recommended (Best Practice) Dual-core 2