G.Skill 8GB DDR3-1333. Internal memory: 8192 MB, Internal memory type: DDR3, Memory clock speed: 1333 MHz. Memory voltage: 1.5 V. Compatibility: P8Z68 DELUXE P8Z68-V PRO SABERTOOTH P67 P8P67 DELUXE GA-Z68X-UD5-B3 GA-Z68X-UD4-B3 GA-P67A-UD7