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 6size: 13.3*3cm .Color: greenMaterial: PCBBacked by superior design and rigorous testing, this product is engineered for long life and continuing value.Capacity: 2GBPins: 240-PinVoltage:1.8VForm Factor: DIMMBuffering/ECC: Non-ECC, unbufferedCompatible 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 RAMSDDR for Desktop=184 pinsDDR for Laptop=200 pinsDDR2 for Desktop=240 pinsDDR2 for Laptop=200 pinsDDR3 for Desktop=240 pinsDDR3 for Laptop=204 pinsPackage Contents:4 * Memory RAMOnly 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.