How does Performance Rating in Windows Vista Work?

Windows System Assessment Tools (WinSAT) is a new set of tools in Windows Vista that run tests on the processor, memory, hard disk, general graphics, and gaming graphics and convert results into the system's performance rating. You update components and expect to get a higher rating, you may get confused when the numbers do not increase. It is because the overall rating is only as good as the lowest number on the list instead of the average. If we don’t update the lowest numbered item on the list, the overall rating will not change.