A memory upgrade is typically the easiest and least expensive way to boost your computer's performance. While any time is good to add more memory, there are some scenarios in which adding a memory upgrade makes great sense and can dramatically improve your computer's performance:

You have upgraded your operating system (OS). You have installed memory-intensive software like photo-editing or a 3-D video game.
You work with large files or with three or more programmes at a time. You have added hardware, such as a new processor or a video card. You have purchased a new computer that came with too little system memory.

Dimm 512MB DDR PC3200 Kingston Value Ram

Description : 512MB 400MHz DDR Non-ECC CL3 (3-3-3) DIMM

Detailed Specifications : Standard 64M X 64 Non-ECC 400MHz 184-pin Unbuffered DIMM (SDRAM-DDR, 2.6V, CL3, Gold)

The components on this module include sixteen 32M x 8-bit (8M x 8-bit x 4 Bank) DDR400 SDRAM in TSOP packages. This 184-pin DIMM uses gold contact fingers and requires +2.6V. The electrical and mechanical specifications are as follows :

Features :
Clock Cycle Time (tCK) : 5ns (min.) / 10ns (max.)

Row Cycle Time (tRC) : 55ns (min.)

Refresh Row Cycle Time (tRFC) : 70ns (min.)

Row Active Time (tRAS) : 40ns (min.) / 70,000ns (max.)

Single Power Supply of : +2.6V (+/- .1V)

Power (IDD0) : 3.224 W (operating)

Operating Temperature : 0o C to 70 C

Storage Temperature : -55o C to +150 C