Your motherboard supports unbuffered memory.
Buffered memory contains a buffer to assist the chipset deal with the large electrical load required when the system has a lot of memory. Much like registered modules, buffered modules are typically used in servers and other mission-critical systems where it is extremely important that the data is properly handled.
Unbuffered memory deals directly with the chipset controller with nothing in between as they communicate.
You'll be fine. What speed is the Ballistix?
Your motherboard:
http://www.msi.com/product/mb/Z87G43.html#/?div=Detail