@Renn: I don't really know what that is, though it shouldn't be any danger because I'm building a new PC, not replacing the case on my current PC. This will be my first "dedicated" gaming PC, I had a mini-tower a few years ago, but I bought my current laptop after it started bluescreening 5 times per day. But the laptop can't really handle all my games, so thats why I'm building a gaming PC.
Doesn't matter, you'll still need to use standoffs unless your case doesn't require them. :3
They're small spacing things that screw into your case where the motherboard would normally sit, so the motherboard can rest on them instead of the case. They ensure there's a small gap between your case and your motherboard so they don't touch and short out the motherboard. Not using them usually doesn't damage anything, but it can prevent your PC from starting or make it shut down randomly. After looking at some reviews from the Cooler Master HAF XB, it looks like there's a good chance you'll have to screw in most/all of the stand-offs yourself. This is what they usually look like:

Edited by Rennn, 05 January 2014 - 05:11 AM.