Ram upgrade

Computer Make:
Computer Model: snc302eeh
Computer Version:
Motherboard Make: Biostar Group
Motherboard Model: P4M800-M7A
Motherboard Version: Via P4M800/8237
Processor: Intel Pentium 4 3.06Ghz
Memory: 2 slots: 512 MB, empty

Good afternoon, i need help locating a scanner or program that can tell me how much ram i can install on my computer, rigth now I have 512 mb. I tried crucial and kingston and they were unable to answer the question. The automatic scanner also was not able to help.
The results of 4 all memory scanner are posted above but they also don't give me range or memory max either.
My computer is a Systemax Venture running xp pro sp2

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I've included a screen shot of my system information.

confused

 

I put the motherboard model name in the search field on Crucial's website, and this came up: http://www.crucial.com/store/ListParts.aspx?model=P4M800-M7A (V1.0)

Then I did the same thing with Kingston's website: http://www.ec.kingston.com/ecom/con...-M7A+Motherboard&distributor=0&submit1=Search

 

I would check Biostars QVL list for the compatible memory. Strange how crucial etc didn't work.:confused It's never failed me having done some 40 upgrades for people.

EDIT: I bow to the memory master, Mimsy.

 

Site search ftw.