"if the amount of RAM installed in the motherboard is greater then the approximated 3.2GB?"
I think you are fishing for an affirmative that "this causes that." No, XP doesn't bluescreen just because you installed over 3.2GB RAM. It is however prone to BSOD for a few million reasons.
In your case you may be encountering a common problem of memory compatibility. Too many think that if it plugs in, it should be fine. Some know that's not entirely true and stick to brand ram.
As more get burnt over failed memory upgrades they learn about the BIOS version (it matters) and that if we don't use memory that's "on the list" by the maker then we know to dive into the bios to compare the ram voltage and timing settings and HOPE that we can tweak those to make it work.
This is not an offer to write a tutorial. Just sharing that it's not that.
if the amount of RAM installed in the motherboard is greater then the approximated 3.2GB? I have been having this problem ever since i bought my two new dual channel 2GB set (2x1GB), and before i had a 1GB set (2x512MB). I plugged the new memory in, worked perfectly, was even recognized by my Smart RAM program but once i ran 3DMark05 (yea i know old version but it was a trial), i got a blue screen of death. I'm thinking of just sticking with the 2GB set, but if 3GB is possible, why not?
My system specs:
ASUS P5B Deluxe edition, wifi-ap
Intel Core 2 Duo E6400 2.13ghz
XFX 8800gt XXX-edition
ask if any othr info is needed.