Instead of searching the motherboard manufacturer's web page, you're better off searching ram maker's sites. You (usually) still need to know what kind of motherboard you have.

www.kingston.com
www.crucial.com (actually has a system scanner on it, might make the whole thing simpler for non-techies)
http://configurator.ocztechnology.co...sp?classid=108
http://www.corsairmemory.com/corsair...or_search.html

I personally would recommend either ocz ram or corsair... they seem to be ahead of the pack in performance and reliability and have been for some time.

Also, from my memory the 266 ram would be better for your system than 333 simply because of the rounded clock speed (i.e. 533 = 266 *2).
Systems *seem* to work better when running with even multipliers like this. Technically the 333 should work faster, but it isn't always so.

Isop