The first memory with Double Data Rate (DDR) technology are more suited for older PCs and laptops. There you can nevertheless be very useful used for cost extension or repair, to continue using the respective system. In general, there are a maximum of 512 MB of memory on a module.
With the DDR2 modules, many systems are operated today. Due to the low price is an upgrade to the more offers here more. Expect possibility, for example, a shorter reaction time the operating system or different applications. These modules are a ilable with us with up to 1GB of memory.
This standard is currently the most used. Although SDRAM is already a ilable, you can still make full use of all current applications with DDR3 RAM. However, you should be sure to use a 64-bit operating system, so you can use more than 3 GB of memory. This memory type is also used in many of our complete systems, so order with the same memory, if you want more power immediately.