System to Video Memory stretch blits are not supported on Intel GMCH devices. This feature allows you to enable a soft copy of system surfaces to video surfaces to conduct an accelerated stretch blit. The advantage is that the stretch blit uses the blend engine and hardware filtering can be applied. The filtering options are listed in Configuration Sets.
A value of 1 for the “SysToVidStretch” enables system-to-video stretch blits, as described above, while a value of 0, disables this feature and forwards all system to video stretch blits to the emulator provided by the operating system.
[HKEY_LOCAL_MACHINE\Drivers\Display\Intel\ALL\1\General]