PhysicsOutkast wrote:without selecting schools at the time of examination
Dude, regardless if you apply to schools that require this or not, at least pick 4 schools that DO require it and put it on the PGRE forms. Even if you don't end up applying to these schools you have nothing to lose. If you end up getting a good score, then you can follow through in applying to those schools if you wish.
Plus, it is healthy to examine your own results in the PGRE to determine how "capable" you are. Now, I'm not saying that the PGRE will tell how well you will perform in graduate school, but it is an indicator. If you are scoring in the 400s or even 500s, there should be red flags going up in your own mind, not just in an admission committees mind. With that being said, there have been plenty of people who have made it through graduate school with a low PGRE, but remember, graduate school in physics isn't suppose to be easy and if you come from a lacking physics background like I did, you'll want to make sure you're ready to some extent.