Sleep is a power saving or low power consumption state commonly known as Stand-by. But what’s the differences between the two Sleep modes (the normal/basic Standby version versus the Hybrid Sleep mode)? Unknowing to many, since Windows Vista, Windows also has a new feature named Hybrid Sleep, primarily aim and mostly useful for desktop PC and workstation computer.
Standby or Sleep is actually Windows implementation name of ACPI mode S3, while hibernate implements ACPI mode S4 (see differences between sleep and hibernate). Sleep mode as a fast way to turn off the computer has been supported by Windows operating system for a while, which also known as Standby.