G.Skill 16GB DDR3-1866. Internal memory: 16384 MB, Internal memory type: DDR3, Memory clock speed: 1866 MHz. Memory voltage: 1.5 V. Compatibility: P8Z68 DELUXE P8Z68-V PRO P8Z68-V P8P67 DELUXE P8P67 EVO GA-Z68X-UD7-B3 Z68A-GD80 Z68MA-ED55