XIEDE DDR3 RAM Powerful Stable Performance Quick Response Durable Fast Heat Dissipation Portable Notebook Memory1333Mhz 4GB Item Type: DDR3 Ram Material: Printed Circuit Board Model: DDR3 Memory Capacity: 2GB, 4GB Memory Frequency: 1333Mhz/1600Mhz Bandwidth: PC3-10600, PC3-12800 Pin Number: 204PIN Compatibility: Suitable for Intel, for AMD Applicable Computer: Laptop PC-2100 is DDR 266 Memory PC-2700 is DDR 333 Memory PC-3200 is DDR 400 Memory PC2-4200 is DDR2 533 Memory PC2-4300 is DDR2 533 Memory PC2-5300 is DDR2 667 Memory PC2-6400 is DDR2 800 Memory PC3-8500 is DDR3 1066 Memory PC3-10700 is DDR3 1333 Memory PC3-12800 is DDR3 1600 Memory PC4-17000 is DDR4 2133 Memory PC4-19200 is DDR4 2400 Memory PC4-2666v is DDR4 2666 Memory Memory DDR, DDR2, DDR3, DDR4 Are Not Common to Each Other, and the Slot Sockets Are Different. It Cannot Be Inserted Forcibly to Avoid Damage to the Memory and the Motherboard. Remember! If the Memory Appears: Blue Screen, Crash, Restart, and the Alarm Keeps Beeping, Please Operate According to the Following Methods One by One. if It Does Not Work, It is Determined That It is Not Compatible. You can try the following methods: ⒈The memory is not inserted well, or the gold finger is oxidized. Use an eraser to erase the memory finger and then re-insert it, or change the slot; ⒉The memory slot is dusty or oxidized. Use a brush and wash board water to clean it ⒊The memory is not compatible, try changing the memory. ⒋CMOS is not discharged, try to restore factory settings. (Remove the motherboard battery and put it back in). ⒌The motherboard is not compatible with the CPU, try changing the CPU.