COLGeek's recommendation is as solid as it gets and yes the 212+ will fit that case width no problem with room to spare.
Memory height might be more of a concern = how many slots you're using.
You'll be fine if it's under 41mm tall.
Should be o.k with 212+ lots of people squeeze them into cases 7.5" wide.
Sorry for the late reply, I just got home from work. If memory means RAM, I have two slots and their pretty short (sorry I'm not to tech savvy). But if I remember correctly their pretty close to the CPU. I have a micro ATX motherboard if that helps any.