Memory capacity in Megabytes.
The modern operating systems require 1Gb or more RAM for ensuring stable and fast computer operation. At least 2Gb RAM is required for using MS Windows 7 (64 bit) for ensuring full functionality.
For dual memory support it is necessary to install pairs of memory where both memory modules are of equal capacity.
The type of RAM. Only one type of RAM modules can be used in one motherboard.
Parameter standards:
*Prior to buying the RAM you should verify whether the motherboard has a corresponding memory slot and the support for the relevant type of memory.
CL - the delay of memory cycles in miliseconds. It is recommendable to place identical CL memories in one motherboard. A lower CL time means higher operation speed, however, not all the motherboards can ensure stable operation with high-speed memories. Prior to buying the memory you should verify whether the motherboard supports the CL time that you have selected.