P
Paul Knudsen
It answers your question.
A quote from that excellent article:
If you have a second physical drive, it is in principle better to put
the file there, because it is then less likely that the heads will
have moved away from it. If, though, you have a modern large size of
RAM, actual traffic on the file is likely to be low, even if programs
are rolled out to it, inactive, so the point becomes an academic one.
If you do put the file elsewhere, you should leave a small amount on
C: — an initial size of 2MB with a Maximum of 50 is suitable — so it
can be used in emergency. Without this, the system is inclined to
ignore the settings and either have no page file at all (and complain)
or make a very large one indeed on C: