The main difference is the compiler that is used for compiling ffdshow.ax and thereby resulting CPU requirements:
| Build | Bit | Compiler | Requirements |
|---|---|---|---|
| Generic | 32 | Microsoft Visual C++ | i686-compatible CPU like Pentium Pro/Athlon or higher |
| 64 | Microsoft Visual C++ | 64-bit CPU and 64-bit Windows | |
| ICL10 | 32 | Intel C++ Compiler | SSE-capable CPU like Pentium III/Athlon XP or higher |