Memory Type: DDR2 PC2-6400, DDR2 PC2-5300, DDR2 PC2-8500, DDR3 PC3-8500, DDR3 PC3-10600, DDR2, DDR3 (non-ECC)
Maximum Memory: 8GB
Slots: 4
Each memory slot can hold DDR2 PC2-6400, DDR2 PC2-5300, DDR2 PC2-8500, DDR3 PC3-8500, DDR3 PC3-10600 with a maximum of 4GB kit (2GBx2) per slot.*
*Not to exceed manufacturer supported memory.

Although the memory can be installed one module at a time, the best performance comes from using matched pairs of modules.DDR3 and DDR2 modules can not be utilized at the same time. Each memory type is supported seperately.

How much memory your Windows OS will recognize depends on which version of Windows you are running. 32-bit versions of Windows will see (and utilize) only 3GB or 3.5GB. To utilize more memory, install a 64-bit version of your OS. More information about OS memory maximums can be found here.

Memory or DRAM is the 'working' memory of the computer. It's used to store data for programs (sequences of instructions) on a temporary basis.

video - installing memory

Chipset is a set of integrated circuits that have a specific purpose in a computer system, a group of microchips used together to perform a single task.

External Connector: 15-hole connector

Graphics Card A circuit board fitted to a computer containing the necessary video memory and other electronics to provide a bitmap display. Adaptors vary in the resolution (number of pixels) and number of colours they can display, and in the refresh rate they support. These parameters are also limited by the monitor to which the adaptor is connected.