Specification: Model: DDR Memory frequency: 266MHz Memory capacity: 1G Compatible: Fully compatible with Intel/AMD Compatible computer: laptop Bandwidth: PC-2100 Voltage: 2.5V Pin number: 200 pins Product size: approx. 6.8*3.2*0.3cm/2.7*1.3*0.1inch Package list: 1 * ram Note: The memory is divided into DDR, DDR2, DDR3 model. Check the following list to find out what memory is installed in your computer and what memory you need to purchase. If you don't know which memory is right for your computer, use a software test to see what memory your love machine needs. After running the software, look at the "maximum bandwidth" column of the "SPD" option, you will see "PCxx00", as follows: PC2100 is DDR 266 memory PC2700 is DDR 333 memory PC3200 is DDR 400 memory PC4200 is DDR2 533 memory PC4300 is DDR2 533 memory PC5300 is DDR2 667 memory PC6400 is DDR2 800 memory PC8500 is DDR3 1066 memory PC10700 is DDR3 1333 memory PC12800 is DDR3 1600 memory DDR, DDR2, DDR3 memories are not common to each other, the slot sockets are not the same and cannot be forced to be inserted so as not to damage the memory or the motherboard, remember! If the memory appears: blue screen, crash, reboot, alarm sounds, please follow the following methods, otherwise it is determined to be unsupported.