Maximum virtual memory size
 

I am aware that the optimal page file sizes are 1.5 to 3 times actual RAM but
I was under the impression that the maximum XP 32-bit could manage was 4Gb.

Has this upper limit been removed or increased?

I came across a Dell Latitude laptop with 3.5 Gb RAM accessible to Windows
XP Pro SP3, where Dell had set the pagefile to min 2Gb, max 4Gb, yet the
system recommended size was 5.25Gb or thereabouts in line with the 1.5x
factor.

Is there any point in increasing the max to beyond 4Gb unless Windows XP SP3
can manage it?