Many versions of this ISO include registry adjustments and service optimizations meant to reduce RAM usage and improve boot times.
Essential runtimes like DirectX, .NET Framework, and Visual C++ Redistributables are often baked into the image to save you time after formatting. Windows 7 ROG RAMPAGE 64 bit ISO Download
This version is packed with "out of the box" features that standard Windows 7 lacks: Many versions of this ISO include registry adjustments