It's really only there to resolve possible issues with the current device information, and the only possible way that it can improve performance is if there is something wrong with the system to start with (most likely due to user error or users using crappy tweak programs). It's why -overall is a command line option and not the default state. Of course, the system does need to know what is what, which is why you should install them, but running -overall won't actually make it better. ![]() If you use -overall, I believe it will replace the Intel AHCI driver with the generic Microsoft one, so although it will show as Intel in the device manager, the driver files loaded will be the Microsoft drivers. ![]() Thinks like ACHI, MEI, and on Windows 7, the USB 3.0 driver do actually have proper drivers, but the Intel Chipset does signal just to use the generic system drivers for these if the others are not installed (apart from MEI). The reason why the Intel Chipset driver is needed is if the OS doesn't have the information for the devices. ![]() Some others tell the system to use the Microsoft driver. Most inf drivers are just the device descriptor for the manufacturer, model, etc of the device, and the device name, they are otherwise functionless.
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