Animated skins also tend to have more impact on your CPU if not properly sized and compressed by the developer.Skins that use many high definition graphics also use more RAM but this isn’t really an issue for modern windows computers.Skins with higher refresh rates tend to use more system resources.There are several factors which determine whether a skin will affect your pc performance or not, they include: The amount of system resources used by Rainmeter is highly dependent on the skins you have loaded on your desktop and the power of your machine. Rainmeter on its own is a very lightweight program and doesn’t affect your system performance at all during normal use or while gaming.