Frequency: PC3-14900 (1866MHz) 1. Strict testing: Please check the specifications of the device before purchasing. For example, computer motherboard model/RAM model/RAM slot/RAM frequency/maximum memory capacity. 2. Standard voltage range: 1.425V~1.575V voltage range can work normally, effectively prevent voltage fluctuation/computer power supply aging, affecting RAM service life and work efficiency.Timings: CL13. 3. Memory architecture: Adopt high-performance memory particles 512MB * 16 architecture mode, increase heat dissipation, more friendly to old motherboard / cpu. 4. Stability: High performance memory granule Double rank memory distribution, combined with a unique thermal design,, wide range voltageļ¼Keeping the best at all times.: The appearance of aluminum alloy heat-drawn net helps to dissipate heat and prevent static electricity. 5. Please our service staff if you have any questions, we will sort it out within 24 hours. Thanks for choosing us. Wish a happy shopping experience.