thanks for the info your really helpful
i looked up the specs for my computer :
* Dual channel memory architecture
* Two 240-pin DDR2 DIMM sockets
* Supported DIMM types:
o PC2-4200 (533 MHz)
o PC2-5300 (667 MHz)
o PC2-6400 (800 MHz)
* Non-ECC memory only, unbuffered
* Supports 2GB DDR2 DIMMs
* Supports up to 4 GB*
o 32 bit PCs cannot address a full 4.0 GB of memory.
i was thinking about expanding the memory all the way to 4gb (right now its 2 gb) because a friend told me it will run faster, how can i go about doing this?