More Memory Available Means Faster Performance
The speed of your processor is only one of the things that affects the performance of a PC; the amount of memory you have makes a huge difference to how fast Windows and your applications run (the speed of your hard drive matters as well, partly for loading files and application code but also because Windows uses space on the hard drive for swapping in and out information it can’t fit into memory all of the time).
Windows 8 uses less memory than Windows 7. You can see from Task Manager that with just Windows running and no applications or background tasks, there’s less memory in use and more for your applications. More memory for programs means they run faster; or you can run more applications before the system needs to start using the hard drive for extra space, which slows things down. Needing less memory brings down power requirements as well; putting more memory in a PC means it uses more power, especially when it’s asleep but the RAM still needs power.
First, Windows 8 uses less memory for Windows itself, and it prioritizes the code that’s used more often to stay in memory. Next there are fewer services that run in the background, and the ones that do run are started when you need them and then stopped. Plus if many programs use the same libraries; if multiple applications load the same code into memory Windows only keeps one copy in memory and shares it between the different applications that use it. The combination means that with the same mix of applications running – Word, Excel, Outlook, OneNote, multiple browser Windows plus background tasks like SkyDrive Sync and Windows Defender, a clipboard manager and other system utilities – there’s more memory available in Windows 8 (marked in green) and less in use (marked orange).