1、High quality chips and memory particles, powerful and stable performance, long service life. 2、Whether it is playing games or working, it can provide you with fast responses time and fluent operation efficiency. 3、Increases the memory capacity, improves the computer's operating speed, and brings higher efficiency to your work and life. 4、Fully compatible (for Intel/AMD) notebook computer memory module, made of PCB material, durable. 5、4GB memory capacity, 1066Mhz memory frequency, PC3-8500 bandwidth, 1.5V voltage, 204PIN pin number. Item Type: DDR3 RAM Material: PCB Model: DDR3 Memory Capacity: 4GB Memory Frequency: 1066Mhz Bandwidth: PC3-8500 Voltage: 1.5V Pin Number: 204PIN Compatibility: Fully Compatible Applicable Computer: Laptop Note: The memory is divided into storage card, DDR, DDR2, DDR3, DDR4 models. Please check the following list to know what memory has been installed in your computer, and what memory you need to buy. If you don't know which memory is suitable for your computer, please use the software test to see what memory your favorite computer needs. (Enter in the Baidu search bar: "CPU-Z download" to search for a CPU-Z software to download and unzip), after running the software, look at the "Maximum Bandwidth" column of the "SPD" option, you will see "PCxx00", as follows: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 sockets are also different, and don't insert it forcibly, so as not to damage the memory and 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: 1.The 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; 2.The memory slot is dusty or oxidized. Use a brush and wash board water to clean it (if you don’t have board wash water, just brush it down) 3.The memory is not compatible, try changing the memory. 4.CMOS is not discharged to restore the factory settings, maybe it is normal (the motherboard battery can be removed, and then put it back). 5.The motherboard is not compatible with the CPU, try changing the CPU 1 x Memory Stick