Sounds good... I will try and take a peak at lunch time to see if I can answer some more questions to help you guys solve this...

Your VIA Chipset P4X400-8235 only supports memory modules made with a specific type of chip. Should you find what seems to be the same memory modules elsewhere for a lower price, it is very possible that the cheaper memory modules will not work in your system. By using Memory-Up's Memory Finder,

Ref:

VIA Chipset P4X400-8235 184pin Desktop RAM Memory Upgrade


VIA Chipset P4X400-8235 Specification Memory Type: DDR
Memory Speed: PC2700, PC3200
Chipset: VIA Apollo P4X400 Chipset :
A group of chips that together make up a complete computer processing unit, usually on one circuit board (the motherboard). It may include the main central processor, graphics processors, secondary cache memory, and input-output controllers. Memory is one component controlled by the chipset.


Memory Type: Non-ECC Non-Registered,
Memory Slot(s): 3
Max. Memory Per System: 3072MB (3GB)
Max. Memory Per Slot: 1024MB (1GB)
Dual Channel Memory Support: Not Supported Dual Channel :
A development in motherboard and chipset design that allows for increased bandwidth transfer when using two or more memory modules in separate transfer channels. These separate channels allow each module access to the memory controller, increasing throughput bandwidth. It is a good idea to use matched pairs of modules to ensure the best compatibility for dual channel operation.


Tri-Channel Memory Support: Not Support Tri-Channel :
A development in motherboard and chipset design that allows for increased bandwidth transfer when using three or more memory modules in separate transfer channels. These separate channels allow each module access to the memory controller, increasing throughput bandwidth. It is a good idea to use matched three modules to ensure the best compatibility for tri-channel operation.


Install Memory in Pairs: Not Required




There is all the specs you need. If you try mixing non ecc with ecc they have a conflict.

Max memory for that board is 3 gig.

"RAM limit is dependant on either being 32-bit or 64-bit. There is no need to look up the model number of your MOBO and search and search to find the answer. "

That's for the Operating System (x64 vs x86) not hardware. Every motherboard has a stick size and speed limit as well as a max capacity. If a Mobo has 4 slots and its max capacity is 2 gig, you can only fill the slots with four 512's. If your link is correct, that mobo can take 16gig, or four 4gig sticks max.

Come to think of it, if his motherboard has 3 slots, there's no way the max memory would be 16gig since its not divisible by three. So your guess at his board is most likely incorrect.

My guess at the board was semi-correct. That link is for the Px400 genrealized chipset. The exact chipset for the OP is P4x400-8235. It does have 3 slots with a max of 3GB being supported (1GB max per slot) by that MOBO. I mispoke in my earlier post and corrected myself with the OP & califdadof3 via PM earlier...

Thanks for the clarification though... (the specs for the P4x400-8235 are below) as posted by califdadof3

Memory Type: Non-ECC Non-Registered,
Memory Slot(s): 3
Max. Memory Per System: 3072MB (3GB)
Max. Memory Per Slot: 1024MB (1GB)
Dual Channel Memory Support: Not Supported Dual Channel :
A development in motherboard and chipset design that allows for increased bandwidth transfer when using two or more memory modules in separate transfer channels. These separate channels allow each module access to the memory controller, increasing throughput bandwidth. It is a good idea to use matched pairs of modules to ensure the best compatibility for dual channel operation.

http://www.memory-up.com/Memory/VIAChipset14347.html

How to indent a desktop memory module?

Can you explain what your trying to do?