16GB Total memory using 2pc of 8GB 12800MHz Module 240pin dimm DDR3 1600mhz. This Motherboard can use either 10600 1333mhz or 12800 1600mhz or 8500 1066mhz Lifetime warranty for exchange. We don't use Generic modules to avoid incompatibility issues. Guaranteed to work or you get all of your money back including shipping. MAX MEMORY 32GB SOCKETS 4 COMPATIBLE WITH Gigabyte GA-Z77N-WIFI, GA-Z77P-D3, GA-Z77X-D3H Motherboard