Graphics
- When using Windows Aero, all GDI, GDI+ and DirectDraw applications run in the new compositing window manager known as Desktop Window Manager. The GDI or DirectDraw render paths are redirected through DWM; however GDI or DirectDraw are not hardware-accelerated when they are redirected.
- The Windows Display Driver Model specification does not support horizontal and vertical desktop spanned modes, that is, stretching the desktop across multiple monitors. although Dual View is still available.
- In Windows Vista, the Windows Display Driver Model (WDDM) does not support two different display adapters. When using two display adapters, both must use the same WDDM driver. Although Windows Vista still supports XPDM drivers, a WDDM driver is required for the Windows Aero user experience.
- Windows Vista restricts the amount of memory DPMI programs can have to 32 MB (33,554,432 bytes). The limitation applies to DPMI programs running inside NTVDM. The same is not true for previous versions of Windows.
- For certain CRT monitors, Windows Vista and later no longer support refresh rates higher than 85 Hz.
Read more about this topic: List Of Features Removed In Windows Vista