G.Skill 8GB DDR3-1600. Internal memory: 8192 MB, Internal memory type: DDR3, Memory clock speed: 1600 MHz. Memory voltage: 1.5 V. Compatibility: P8Z68 DELUXE P8Z68-V PRO P8Z68-V P8Z68 DELUXE P8Z68-V PRO P8Z68-V GA-Z68X-UD7-B3 GA-Z68X-UD5-B3