For example, as shown in the figure is the number 4,194,304, then put Xxx / 1024/1024, 4194304/1024/1024 =4. " it means the computer can support up to 4GB Memory"! I do not know if this RAM fit for my computer OK, please download a program on the website: so you can check your computer and confirm your CPU specification. when a specification of the computer is not the same with our information of our RAM memory, please do not buy this article because it will not work properly with your computer. Caution: The imformation of our images is a computer, that we choose to test, is only for reference. For more information about your computer, please see the topic of "CPU" "SPD" "Memory". Sequence: PC2 6400 = DDR2 800MHZ 6 size: 13.3*3cm 100% new and high quality. Color: green Material: PCB Backed by superior design and rigorous testing, this product is engineered for long life and continuing value. Capacity: 2GB Pins: 240-Pin Voltage:1.8V Form Factor: DIMM Buffering/ECC: Non-ECC, unbuffered Compatible with most major of desktop with Intel AMD CPU. It is the best choice for your Intel/AMD cpu motherboard. "How to check the maximum storage capacity of my computer support?" 1. Press the taste "Windows" and "R", then the "Run" appears. 2. Enter ". Then a dialog box appears. 3. Continue typing with "wmic memphysical maxcapacity", then press "Enter" 4. You can then get the number, the unit KB. Pins of Memory RAMS DDR for Desktop=184 pins DDR for Laptop=200 pins DDR2 for Desktop=240 pins DDR2 for Laptop=200 pins DDR3 for Desktop=240 pins DDR3 for Laptop=204 pins Package Contents:4 * Memory RAM Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.