G.Skill 32GB PC3-12800 Kit. Internal memory: 32768 MB, Internal memory type: DDR3, Memory clock speed: 1600 MHz. Memory voltage: 1.5 V. Compatibility: P8Z68 DELUXE P8Z68-V PRO P8Z68-V Maximus IV Extreme SABERTOOTH P67 P8P67 DELUXE P8P67 EVO P8P67 PRO