1. Strict testing: Compatible with all motherboards. Please note: Check the specifications of the device before purchasing. For example, computer motherboard model/RAM model/RAM slot/RAM /maximum compatible 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: CL9. 3. Memory architecture ：Adopt compatible with Samsung / Hynix / Kingston high-performance memory particles 128MB x16 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 voltage，Keeping the best at all times.Security : The appearance of aluminum alloy heat-drawn net helps to dissipate heat and prevent static electricity . 5. If you have any questions, please contact our service staff, we will solve it for you within 24 hours. We support returns and refunds within 30 days, 1 year warranty. Thank you for choosing us and wish you a happy shopping.